// SPDX-License-Identifier: GPL-2.0
/*
 * ov8858 driver
 * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
 * v0.1.0x00 : 1. create file.
 * V0.0X01.0X02 fix mclk issue when probe multiple camera.
 * V0.0X01.0X03 add enum_frame_interval function.
 * V0.0X01.0X04 add quick stream on/off
 * V0.0X01.0X05 add function g_mbus_config
 * V0.0X01.0X06
 * 1. fix g_mbus_config lane config issues.
 * 2. and add debug info
 * 3. add r1a version support
 */

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/regulator/consumer.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/pinctrl/consumer.h>
#include <linux/version.h>
#include <linux/rk-camera-module.h>

#include <media/v4l2-async.h>
#include <media/media-entity.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-image-sizes.h>
#include <media/v4l2-mediabus.h>
#include <media/v4l2-subdev.h>

#define DRIVER_VERSION			KERNEL_VERSION(0, 0x01, 0x06)

#ifndef V4L2_CID_DIGITAL_GAIN
#define V4L2_CID_DIGITAL_GAIN		V4L2_CID_GAIN
#endif
#define OV8858_PIXEL_RATE		(360000000LL * 2LL * 2LL / 10LL)

#define MIPI_FREQ			360000000U
#define OV8858_XVCLK_FREQ		24000000

#define CHIP_ID				0x008858
#define OV8858_REG_CHIP_ID		0x300a

#define OV8858_REG_CTRL_MODE		0x0100
#define OV8858_MODE_SW_STANDBY		0x0
#define OV8858_MODE_STREAMING		0x1

#define OV8858_REG_EXPOSURE		0x3500
#define	OV8858_EXPOSURE_MIN		4
#define	OV8858_EXPOSURE_STEP		1
#define OV8858_VTS_MAX			0x7fff

#define OV8858_REG_GAIN_H		0x3508
#define OV8858_REG_GAIN_L		0x3509
#define OV8858_GAIN_H_MASK		0x07
#define OV8858_GAIN_H_SHIFT		8
#define OV8858_GAIN_L_MASK		0xff
#define OV8858_GAIN_MIN			0x80
#define OV8858_GAIN_MAX			0x7ff
#define OV8858_GAIN_STEP		1
#define OV8858_GAIN_DEFAULT		0x80

#define OV8858_REG_TEST_PATTERN		0x5e00
#define	OV8858_TEST_PATTERN_ENABLE	0x80
#define	OV8858_TEST_PATTERN_DISABLE	0x0

#define OV8858_REG_VTS			0x380e

#define REG_NULL			0xFFFF

#define OV8858_REG_VALUE_08BIT		1
#define OV8858_REG_VALUE_16BIT		2
#define OV8858_REG_VALUE_24BIT		3

#define OV8858_LANES			2
#define OV8858_BITS_PER_SAMPLE		10

#define OV8858_CHIP_REVISION_REG	0x302A
#define OV8858_R1A			0xb0
#define OV8858_R2A			0xb2

#define OF_CAMERA_PINCTRL_STATE_DEFAULT	"rockchip,camera_default"
#define OF_CAMERA_PINCTRL_STATE_SLEEP	"rockchip,camera_sleep"

#define OV8858_NAME			"ov8858"
#define OV8858_MEDIA_BUS_FMT		MEDIA_BUS_FMT_SBGGR10_1X10

#define ov8858_write_1byte(client, reg, val)	\
	ov8858_write_reg((client), (reg), OV8858_REG_VALUE_08BIT, (val))

#define ov8858_read_1byte(client, reg, val)	\
	ov8858_read_reg((client), (reg), OV8858_REG_VALUE_08BIT, (val))

static const struct regval *ov8858_global_regs;

struct ov8858_otp_info_r1a {
	int flag; // bit[7]: info, bit[6]:wb, bit[5]:vcm, bit[4]:lenc
	int module_id;
	int lens_id;
	int year;
	int month;
	int day;
	int rg_ratio;
	int bg_ratio;
	int light_rg;
	int light_bg;
	int lenc[110];
	int vcm_start;
	int vcm_end;
	int vcm_dir;
};

struct ov8858_otp_info_r2a {
	int flag; // bit[7]: info, bit[6]:wb, bit[5]:vcm, bit[4]:lenc
	int module_id;
	int lens_id;
	int year;
	int month;
	int day;
	int rg_ratio;
	int bg_ratio;
	int lenc[240];
	int checksum;
	int vcm_start;
	int vcm_end;
	int vcm_dir;
};

static const char * const ov8858_supply_names[] = {
	"avdd",		/* Analog power */
	"dovdd",	/* Digital I/O power */
	"dvdd",		/* Digital core power */
};

#define OV8858_NUM_SUPPLIES ARRAY_SIZE(ov8858_supply_names)

struct regval {
	u16 addr;
	u8 val;
};

struct ov8858_mode {
	u32 width;
	u32 height;
	struct v4l2_fract max_fps;
	u32 hts_def;
	u32 vts_def;
	u32 exp_def;
	const struct regval *reg_list;
};

struct ov8858 {
	struct i2c_client	*client;
	struct clk		*xvclk;
	struct gpio_desc	*power_gpio;
	struct gpio_desc	*reset_gpio;
	struct gpio_desc	*pwdn_gpio;
	struct regulator_bulk_data supplies[OV8858_NUM_SUPPLIES];

	struct pinctrl		*pinctrl;
	struct pinctrl_state	*pins_default;
	struct pinctrl_state	*pins_sleep;

	struct v4l2_subdev	subdev;
	struct media_pad	pad;
	struct v4l2_ctrl_handler ctrl_handler;
	struct v4l2_ctrl	*exposure;
	struct v4l2_ctrl	*anal_gain;
	struct v4l2_ctrl	*digi_gain;
	struct v4l2_ctrl	*hblank;
	struct v4l2_ctrl	*vblank;
	struct v4l2_ctrl	*test_pattern;
	struct mutex		mutex;
	bool			streaming;
	const struct ov8858_mode *cur_mode;
	bool			is_r2a;
	unsigned int		lane_num;
	unsigned int		cfg_num;
	unsigned int		pixel_rate;
	bool			power_on;

	struct ov8858_otp_info_r1a *otp_r1a;
	struct ov8858_otp_info_r2a *otp_r2a;
	u32			module_index;
	const char		*module_facing;
	const char		*module_name;
	const char		*len_name;
	struct rkmodule_inf	module_inf;
	struct rkmodule_awb_cfg	awb_cfg;
	struct rkmodule_lsc_cfg	lsc_cfg;
};

#define to_ov8858(sd) container_of(sd, struct ov8858, subdev)

struct ov8858_id_name {
	u32 id;
	char name[RKMODULE_NAME_LEN];
};

static const struct ov8858_id_name ov8858_module_info[] = {
	{0x01, "Sunny"},
	{0x02, "Truly"},
	{0x03, "A-kerr"},
	{0x04, "LiteArray"},
	{0x05, "Darling"},
	{0x06, "Qtech"},
	{0x07, "OFlim"},
	{0x08, "Huaquan/Kingcom"},
	{0x09, "Booyi"},
	{0x0a, "Laimu"},
	{0x0b, "WDSEN"},
	{0x0c, "Sunrise"},
	{0x0d, "CameraKing"},
	{0x0e, "Sunniness/Riyong"},
	{0x0f, "Tongju"},
	{0x10, "Seasons/Sijichun"},
	{0x11, "Foxconn"},
	{0x12, "Importek"},
	{0x13, "Altek"},
	{0x14, "ABICO/Ability"},
	{0x15, "Lite-on"},
	{0x16, "Chicony"},
	{0x17, "Primax"},
	{0x18, "AVC"},
	{0x19, "Suyin"},
	{0x21, "Sharp"},
	{0x31, "MCNEX"},
	{0x32, "SEMCO"},
	{0x33, "Partron"},
	{0x41, "Reach/Zhongliancheng"},
	{0x42, "BYD"},
	{0x43, "OSTEC(AoShunChuang)"},
	{0x44, "Chengli"},
	{0x45, "Jiali"},
	{0x46, "Chippack"},
	{0x47, "RongSheng"},
	{0x48, "ShineTech/ShenTai"},
	{0x49, "Brodsands"},
	{0x50, "Others"},
	{0x51, "Method"},
	{0x52, "Sunwin"},
	{0x53, "LG"},
	{0x54, "Goertek"},
	{0x00, "Unknown"}
};

static const struct ov8858_id_name ov8858_lens_info[] = {
	{0x10, "Largan 9565A1"},
	{0x11, "Largan 9570A/A1"},
	{0x12, "Largan 9569A2/A3"},
	{0x13, "Largan 40108/A1"},
	{0x14, "Largan 50030A1"},
	{0x15, "Largan 40109A1"},
	{0x16, "Largan 40100/A1"},
	{0x17, "Largan 40112/A1"},
	{0x30, "Sunny 3813A"},
	{0x50, "Kantatsu R5AV08/BV"},
	{0x51, "Kantatsu S5AE08"},
	{0x52, "Kantatsu S5AE08"},
	{0x78, "GSEO 8738"},
	{0x79, "GSEO 8744"},
	{0x7a, "GSEO 8742"},
	{0x80, "Foxconn 8028"},
	{0xd8, "XinXu DS-8335"},
	{0xd9, "XinXu DS-8341"},
	{0x00, "Unknown"}
};

/*
 * Xclk 24Mhz
 */
static const struct regval ov8858_global_regs_r1a_2lane[] = {
	//@@5.1.1.1 Initialization (Global Setting)
	//; Slave_ID=0x6c;
	//{0x0103 ,0x01 }, software reset
	{0x0100, 0x00},
	{0x0100, 0x00},
	{0x0100, 0x00},
	{0x0100, 0x00},
	{0x0302, 0x1e},
	{0x0303, 0x00},
	{0x0304, 0x03},
	{0x030e, 0x00},
	{0x030f, 0x09},
	{0x0312, 0x01},
	{0x031e, 0x0c},
	{0x3600, 0x00},
	{0x3601, 0x00},
	{0x3602, 0x00},
	{0x3603, 0x00},
	{0x3604, 0x22},
	{0x3605, 0x30},
	{0x3606, 0x00},
	{0x3607, 0x20},
	{0x3608, 0x11},
	{0x3609, 0x28},
	{0x360a, 0x00},
	{0x360b, 0x06},
	{0x360c, 0xdc},
	{0x360d, 0x40},
	{0x360e, 0x0c},
	{0x360f, 0x20},
	{0x3610, 0x07},
	{0x3611, 0x20},
	{0x3612, 0x88},
	{0x3613, 0x80},
	{0x3614, 0x58},
	{0x3615, 0x00},
	{0x3616, 0x4a},
	{0x3617, 0xb0},
	{0x3618, 0x56},
	{0x3619, 0x70},
	{0x361a, 0x99},
	{0x361b, 0x00},
	{0x361c, 0x07},
	{0x361d, 0x00},
	{0x361e, 0x00},
	{0x361f, 0x00},
	{0x3638, 0xff},
	{0x3633, 0x0c},
	{0x3634, 0x0c},
	{0x3635, 0x0c},
	{0x3636, 0x0c},
	{0x3645, 0x13},
	{0x3646, 0x83},
	{0x364a, 0x07},
	{0x3015, 0x01},
	{0x3018, 0x32},
	{0x3020, 0x93},
	{0x3022, 0x01},
	{0x3031, 0x0a},
	{0x3034, 0x00},
	{0x3106, 0x01},
	{0x3305, 0xf1},
	{0x3308, 0x00},
	{0x3309, 0x28},
	{0x330a, 0x00},
	{0x330b, 0x20},
	{0x330c, 0x00},
	{0x330d, 0x00},
	{0x330e, 0x00},
	{0x330f, 0x40},
	{0x3307, 0x04},
	{0x3500, 0x00},
	{0x3501, 0x4d},
	{0x3502, 0x40},
	{0x3503, 0x00},
	{0x3505, 0x80},
	{0x3508, 0x04},
	{0x3509, 0x00},
	{0x350c, 0x00},
	{0x350d, 0x80},
	{0x3510, 0x00},
	{0x3511, 0x02},
	{0x3512, 0x00},
	{0x3700, 0x18},
	{0x3701, 0x0c},
	{0x3702, 0x28},
	{0x3703, 0x19},
	{0x3704, 0x14},
	{0x3705, 0x00},
	{0x3706, 0x35},
	{0x3707, 0x04},
	{0x3708, 0x24},
	{0x3709, 0x33},
	{0x370a, 0x00},
	{0x370b, 0xb5},
	{0x370c, 0x04},
	{0x3718, 0x12},
	{0x3719, 0x31},
	{0x3712, 0x42},
	{0x3714, 0x24},
	{0x371e, 0x19},
	{0x371f, 0x40},
	{0x3720, 0x05},
	{0x3721, 0x05},
	{0x3724, 0x06},
	{0x3725, 0x01},
	{0x3726, 0x06},
	{0x3728, 0x05},
	{0x3729, 0x02},
	{0x372a, 0x03},
	{0x372b, 0x53},
	{0x372c, 0xa3},
	{0x372d, 0x53},
	{0x372e, 0x06},
	{0x372f, 0x10},
	{0x3730, 0x01},
	{0x3731, 0x06},
	{0x3732, 0x14},
	{0x3733, 0x10},
	{0x3734, 0x40},
	{0x3736, 0x20},
	{0x373a, 0x05},
	{0x373b, 0x06},
	{0x373c, 0x0a},
	{0x373e, 0x03},
	{0x3755, 0x10},
	{0x3758, 0x00},
	{0x3759, 0x4c},
	{0x375a, 0x06},
	{0x375b, 0x13},
	{0x375c, 0x20},
	{0x375d, 0x02},
	{0x375e, 0x00},
	{0x375f, 0x14},
	{0x3768, 0x22},
	{0x3769, 0x44},
	{0x376a, 0x44},
	{0x3761, 0x00},
	{0x3762, 0x00},
	{0x3763, 0x00},
	{0x3766, 0xff},
	{0x376b, 0x00},
	{0x3772, 0x23},
	{0x3773, 0x02},
	{0x3774, 0x16},
	{0x3775, 0x12},
	{0x3776, 0x04},
	{0x3777, 0x00},
	{0x3778, 0x1b},
	{0x37a0, 0x44},
	{0x37a1, 0x3d},
	{0x37a2, 0x3d},
	{0x37a3, 0x00},
	{0x37a4, 0x00},
	{0x37a5, 0x00},
	{0x37a6, 0x00},
	{0x37a7, 0x44},
	{0x37a8, 0x4c},
	{0x37a9, 0x4c},
	{0x3760, 0x00},
	{0x376f, 0x01},
	{0x37aa, 0x44},
	{0x37ab, 0x2e},
	{0x37ac, 0x2e},
	{0x37ad, 0x33},
	{0x37ae, 0x0d},
	{0x37af, 0x0d},
	{0x37b0, 0x00},
	{0x37b1, 0x00},
	{0x37b2, 0x00},
	{0x37b3, 0x42},
	{0x37b4, 0x42},
	{0x37b5, 0x33},
	{0x37b6, 0x00},
	{0x37b7, 0x00},
	{0x37b8, 0x00},
	{0x37b9, 0xff},
	{0x3800, 0x00},
	{0x3801, 0x0c},
	{0x3802, 0x00},
	{0x3803, 0x0c},
	{0x3804, 0x0c},
	{0x3805, 0xd3},
	{0x3806, 0x09},
	{0x3807, 0xa3},
	{0x3808, 0x06},
	{0x3809, 0x60},
	{0x380a, 0x04},
	{0x380b, 0xc8},
	{0x380c, 0x07},
	{0x380d, 0x88},
	{0x380e, 0x04},
	{0x380f, 0xdc},
	{0x3810, 0x00},
	{0x3811, 0x04},
	{0x3813, 0x02},
	{0x3814, 0x03},
	{0x3815, 0x01},
	{0x3820, 0x00},
	{0x3821, 0x67},
	{0x382a, 0x03},
	{0x382b, 0x01},
	{0x3830, 0x08},
	{0x3836, 0x02},
	{0x3837, 0x18},
	{0x3841, 0xff},
	{0x3846, 0x48},
	{0x3d85, 0x14},
	{0x3f08, 0x08},
	{0x3f0a, 0x80},
	{0x4000, 0xf1},
	{0x4001, 0x10},
	{0x4005, 0x10},
	{0x4002, 0x27},
	{0x4009, 0x81},
	{0x400b, 0x0c},
	{0x401b, 0x00},
	{0x401d, 0x00},
	{0x4020, 0x00},
	{0x4021, 0x04},
	{0x4022, 0x04},
	{0x4023, 0xb9},
	{0x4024, 0x05},
	{0x4025, 0x2a},
	{0x4026, 0x05},
	{0x4027, 0x2b},
	{0x4028, 0x00},
	{0x4029, 0x02},
	{0x402a, 0x04},
	{0x402b, 0x04},
	{0x402c, 0x02},
	{0x402d, 0x02},
	{0x402e, 0x08},
	{0x402f, 0x02},
	{0x401f, 0x00},
	{0x4034, 0x3f},
	{0x403d, 0x04},
	{0x4300, 0xff},
	{0x4301, 0x00},
	{0x4302, 0x0f},
	{0x4316, 0x00},
	{0x4500, 0x38},
	{0x4503, 0x18},
	{0x4600, 0x00},
	{0x4601, 0xcb},
	{0x481f, 0x32},
	{0x4837, 0x16},
	{0x4850, 0x10},
	{0x4851, 0x32},
	{0x4b00, 0x2a},
	{0x4b0d, 0x00},
	{0x4d00, 0x04},
	{0x4d01, 0x18},
	{0x4d02, 0xc3},
	{0x4d03, 0xff},
	{0x4d04, 0xff},
	{0x4d05, 0xff},
	{0x5000, 0x7e},
	{0x5001, 0x01},
	{0x5002, 0x08},
	{0x5003, 0x20},
	{0x5046, 0x12},
	{0x5901, 0x00},
	{0x5e00, 0x00},
	{0x5e01, 0x41},
	{0x382d, 0x7f},
	{0x4825, 0x3a},
	{0x4826, 0x40},
	{0x4808, 0x25},
	//{0x0100, 0x01},
	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 * max_framerate 30fps
 * mipi_datarate per lane 720Mbps
 */
static const struct regval ov8858_1632x1224_regs_r1a_2lane[] = {
	{0x0100, 0x00},
	{0x030e, 0x00}, // pll2_rdiv
	{0x030f, 0x09}, // pll2_divsp
	{0x0312, 0x01}, // pll2_pre_div0, pll2_r_divdac
	{0x3015, 0x01}, //
	{0x3501, 0x4d}, // exposure M
	{0x3502, 0x40}, // exposure L
	//{0x3508, 0x04}, // gain H
	{0x3706, 0x35},
	{0x370a, 0x00},
	{0x370b, 0xb5},
	{0x3778, 0x1b},
	{0x3808, 0x06}, // x output size H
	{0x3809, 0x60}, // x output size L
	{0x380a, 0x04}, // y output size H
	{0x380b, 0xc8}, // y output size L
	{0x380c, 0x07}, // HTS H
	{0x380d, 0x88}, // HTS L
	{0x380e, 0x04}, // VTS H
	{0x380f, 0xdc}, // VTS L
	{0x3814, 0x03}, // x odd inc
	{0x3821, 0x67}, // mirror on, bin on
	{0x382a, 0x03}, // y odd inc
	{0x3830, 0x08},
	{0x3836, 0x02},
	{0x3f0a, 0x80},
	{0x4001, 0x10}, // total 128 black column
	{0x4022, 0x04}, // Anchor left end H
	{0x4023, 0xb9}, // Anchor left end L
	{0x4024, 0x05}, // Anchor right start H
	{0x4025, 0x2a}, // Anchor right start L
	{0x4026, 0x05}, // Anchor right end H
	{0x4027, 0x2b}, // Anchor right end L
	{0x402b, 0x04}, // top black line number
	{0x402e, 0x08}, // bottom black line start
	{0x4500, 0x38},
	{0x4600, 0x00},
	{0x4601, 0xcb},
	{0x382d, 0x7f},

	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 * max_framerate 15fps
 * mipi_datarate per lane 720Mbps
 */
static const struct regval ov8858_3264x2448_regs_r1a_2lane[] = {
	{0x0100, 0x00},

	{0x030e, 0x02}, // pll2_rdiv
	{0x030f, 0x04}, // pll2_divsp
	{0x0312, 0x03}, // pll2_pre_div0, pll2_r_divdac
	{0x3015, 0x00},
	{0x3501, 0x9a},
	{0x3502, 0x20},
	//{0x3508, 0x02},
	{0x3706, 0x6a},
	{0x370a, 0x01},
	{0x370b, 0x6a},
	{0x3778, 0x32},
	{0x3808, 0x0c}, // x output size H
	{0x3809, 0xc0}, // x output size L
	{0x380a, 0x09}, // y output size H
	{0x380b, 0x90}, // y output size L
	{0x380c, 0x07}, // HTS H
	{0x380d, 0x94}, // HTS L
	{0x380e, 0x09}, // VTS H
	{0x380f, 0xaa}, // VTS L
	{0x3814, 0x01}, // x odd inc
	{0x3821, 0x46}, // mirror on, bin off
	{0x382a, 0x01}, // y odd inc
	{0x3830, 0x06},
	{0x3836, 0x01},
	{0x3f0a, 0x00},
	{0x4001, 0x00}, // total 256 black column
	{0x4022, 0x0b}, // Anchor left end H
	{0x4023, 0xc3}, // Anchor left end L
	{0x4024, 0x0c}, // Anchor right start H
	{0x4025, 0x36}, // Anchor right start L
	{0x4026, 0x0c}, // Anchor right end H
	{0x4027, 0x37}, // Anchor right end L
	{0x402b, 0x08}, // top black line number
	{0x402e, 0x0c}, // bottom black line start
	{0x4500, 0x58},
	{0x4600, 0x01},
	{0x4601, 0x97},
	{0x382d, 0xff},

	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 */
static const struct regval ov8858_global_regs_r1a_4lane[] = {
	// MIPI=720Mbps, SysClk=72Mhz,Dac Clock=360Mhz.
	{0x0103, 0x01}, //software reset
	{0x0100, 0x00}, //software standby
	{0x0100, 0x00}, //
	{0x0100, 0x00}, //
	{0x0100, 0x00}, //
	{0x0302, 0x1e}, //pll1_multi
	{0x0303, 0x00}, //pll1_divm
	{0x0304, 0x03}, //pll1_div_mipi
	{0x030e, 0x00}, //pll2_rdiv
	{0x030f, 0x09}, //pll2_divsp
	{0x0312, 0x01}, //pll2_pre_div0, pll2_r_divdac
	{0x031e, 0x0c}, //pll1_no_lat
	{0x3600, 0x00},
	{0x3601, 0x00},
	{0x3602, 0x00},
	{0x3603, 0x00},
	{0x3604, 0x22},
	{0x3605, 0x30},
	{0x3606, 0x00},
	{0x3607, 0x20},
	{0x3608, 0x11},
	{0x3609, 0x28},
	{0x360a, 0x00},
	{0x360b, 0x06},
	{0x360c, 0xdc},
	{0x360d, 0x40},
	{0x360e, 0x0c},
	{0x360f, 0x20},
	{0x3610, 0x07},
	{0x3611, 0x20},
	{0x3612, 0x88},
	{0x3613, 0x80},
	{0x3614, 0x58},
	{0x3615, 0x00},
	{0x3616, 0x4a},
	{0x3617, 0xb0},
	{0x3618, 0x56},
	{0x3619, 0x70},
	{0x361a, 0x99},
	{0x361b, 0x00},
	{0x361c, 0x07},
	{0x361d, 0x00},
	{0x361e, 0x00},
	{0x361f, 0x00},
	{0x3638, 0xff},
	{0x3633, 0x0c},
	{0x3634, 0x0c},
	{0x3635, 0x0c},
	{0x3636, 0x0c},
	{0x3645, 0x13},
	{0x3646, 0x83},
	{0x364a, 0x07},
	{0x3015, 0x01}, //
	{0x3018, 0x72}, //MIPI 4 lane
	{0x3020, 0x93}, //Clock switch output normal, pclk_div =/1
	{0x3022, 0x01}, //pd_mipi enable when rst_sync
	{0x3031, 0x0a}, //MIPI 10-bit mode
	{0x3034, 0x00},
	{0x3106, 0x01}, //sclk_div, sclk_pre_div
	{0x3305, 0xf1},
	{0x3308, 0x00},
	{0x3309, 0x28},
	{0x330a, 0x00},
	{0x330b, 0x20},
	{0x330c, 0x00},
	{0x330d, 0x00},
	{0x330e, 0x00},
	{0x330f, 0x40},
	{0x3307, 0x04},
	{0x3500, 0x00}, //exposure H
	{0x3501, 0x4d}, //exposure M
	{0x3502, 0x40}, //exposure L
	{0x3503, 0x00}, //gain delay 1 frame, exposure delay 1 frame, real gain
	{0x3505, 0x80}, //gain option
	{0x3508, 0x04}, //gain H
	{0x3509, 0x00}, //gain L
	{0x350c, 0x00}, //short gain H
	{0x350d, 0x80}, //short gain L
	{0x3510, 0x00}, //short exposure H
	{0x3511, 0x02}, //short exposure M
	{0x3512, 0x00}, //short exposure L
	{0x3700, 0x18},
	{0x3701, 0x0c},
	{0x3702, 0x28},
	{0x3703, 0x19},
	{0x3704, 0x14},
	{0x3705, 0x00},
	{0x3706, 0x35},
	{0x3707, 0x04},
	{0x3708, 0x24},
	{0x3709, 0x33},
	{0x370a, 0x00},
	{0x370b, 0xb5},
	{0x370c, 0x04},
	{0x3718, 0x12},
	{0x3719, 0x31},
	{0x3712, 0x42},
	{0x3714, 0x24},
	{0x371e, 0x19},
	{0x371f, 0x40},
	{0x3720, 0x05},
	{0x3721, 0x05},
	{0x3724, 0x06},
	{0x3725, 0x01},
	{0x3726, 0x06},
	{0x3728, 0x05},
	{0x3729, 0x02},
	{0x372a, 0x03},
	{0x372b, 0x53},
	{0x372c, 0xa3},
	{0x372d, 0x53},
	{0x372e, 0x06},
	{0x372f, 0x10},
	{0x3730, 0x01},
	{0x3731, 0x06},
	{0x3732, 0x14},
	{0x3733, 0x10},
	{0x3734, 0x40},
	{0x3736, 0x20},
	{0x373a, 0x05},
	{0x373b, 0x06},
	{0x373c, 0x0a},
	{0x373e, 0x03},
	{0x3755, 0x10},
	{0x3758, 0x00},
	{0x3759, 0x4c},
	{0x375a, 0x06},
	{0x375b, 0x13},
	{0x375c, 0x20},
	{0x375d, 0x02},
	{0x375e, 0x00},
	{0x375f, 0x14},
	{0x3768, 0x22},
	{0x3769, 0x44},
	{0x376a, 0x44},
	{0x3761, 0x00},
	{0x3762, 0x00},
	{0x3763, 0x00},
	{0x3766, 0xff},
	{0x376b, 0x00},
	{0x3772, 0x23},
	{0x3773, 0x02},
	{0x3774, 0x16},
	{0x3775, 0x12},
	{0x3776, 0x04},
	{0x3777, 0x00},
	{0x3778, 0x1b},
	{0x37a0, 0x44},
	{0x37a1, 0x3d},
	{0x37a2, 0x3d},
	{0x37a3, 0x00},
	{0x37a4, 0x00},
	{0x37a5, 0x00},
	{0x37a6, 0x00},
	{0x37a7, 0x44},
	{0x37a8, 0x4c},
	{0x37a9, 0x4c},
	{0x3760, 0x00},
	{0x376f, 0x01},
	{0x37aa, 0x44},
	{0x37ab, 0x2e},
	{0x37ac, 0x2e},
	{0x37ad, 0x33},
	{0x37ae, 0x0d},
	{0x37af, 0x0d},
	{0x37b0, 0x00},
	{0x37b1, 0x00},
	{0x37b2, 0x00},
	{0x37b3, 0x42},
	{0x37b4, 0x42},
	{0x37b5, 0x33},
	{0x37b6, 0x00},
	{0x37b7, 0x00},
	{0x37b8, 0x00},
	{0x37b9, 0xff},
	{0x3800, 0x00}, //x start H
	{0x3801, 0x0c}, //x start L
	{0x3802, 0x00}, //y start H
	{0x3803, 0x0c}, //y start L
	{0x3804, 0x0c}, //x end H
	{0x3805, 0xd3}, //x end L
	{0x3806, 0x09}, //y end H
	{0x3807, 0xa3}, //y end L
	{0x3808, 0x06}, //x output size H
	{0x3809, 0x60}, //x output size L
	{0x380a, 0x04}, //y output size H
	{0x380b, 0xc8}, //y output size L
	{0x380c, 0x07}, //03}, //HTS H
	{0x380d, 0x88}, //c4}, //HTS L
	{0x380e, 0x04}, //VTS H
	{0x380f, 0xdc}, //VTS L
	{0x3810, 0x00}, //ISP x win H
	{0x3811, 0x04}, //ISP x win L
	{0x3813, 0x02}, //ISP y win L
	{0x3814, 0x03}, //x odd inc
	{0x3815, 0x01}, //x even inc
	{0x3820, 0x00}, //vflip off
	{0x3821, 0x67}, //mirror on, bin on
	{0x382a, 0x03}, //y odd inc
	{0x382b, 0x01}, //y even inc
	{0x3830, 0x08},
	{0x3836, 0x02},
	{0x3837, 0x18},
	{0x3841, 0xff}, //window auto size enable
	{0x3846, 0x48},
	{0x3d85, 0x14}, //OTP power up load data enable, setting disable
	{0x3f08, 0x08},
	{0x3f0a, 0x80},
	{0x4000, 0xf1}, //out_range/format/gain/exp_chg_trig, median filter enable
	{0x4001, 0x10}, //total 128 black column
	{0x4005, 0x10}, //BLC target L
	{0x4002, 0x27}, //value used to limit BLC offset
	{0x4009, 0x81}, //final BLC offset limitation enable
	{0x400b, 0x0c}, //DCBLC on, DCBLC manual mode on
	{0x401b, 0x00}, //zero line R coefficient
	{0x401d, 0x00}, //zoro line T coefficient
	{0x4020, 0x00}, //Anchor left start H
	{0x4021, 0x04}, //Anchor left start L
	{0x4022, 0x04}, //Anchor left end H
	{0x4023, 0xb9}, //Anchor left end L
	{0x4024, 0x05}, //Anchor right start H
	{0x4025, 0x2a}, //Anchor right start L
	{0x4026, 0x05}, //Anchor right end H
	{0x4027, 0x2b}, //Anchor right end L
	{0x4028, 0x00}, //top zero line start
	{0x4029, 0x02}, //top zero line number
	{0x402a, 0x04}, //top black line start
	{0x402b, 0x04}, //top black line number
	{0x402c, 0x02}, //bottom zero line start
	{0x402d, 0x02}, //bottom zoro line number
	{0x402e, 0x08}, //bottom black line start
	{0x402f, 0x02}, //bottom black line number
	{0x401f, 0x00}, //interpolation x & y disable, Anchor one disable
	{0x4034, 0x3f},
	{0x403d, 0x04}, //md_precision_en
	{0x4300, 0xff}, //clip max H
	{0x4301, 0x00}, //clip min H
	{0x4302, 0x0f}, //clip min L, clip max L
	{0x4316, 0x00},
	{0x4500, 0x38},
	{0x4503, 0x18},
	{0x4600, 0x00},
	{0x4601, 0xcb},
	{0x481f, 0x32}, //clk prepare min
	{0x4837, 0x16}, //global timing
	{0x4850, 0x10}, //lane 1 = 1, lane 0 = 0
	{0x4851, 0x32}, //lane 3 = 3, lane 2 = 2
	{0x4b00, 0x2a},
	{0x4b0d, 0x00},
	{0x4d00, 0x04}, //temperature sensor
	{0x4d01, 0x18},
	{0x4d02, 0xc3},
	{0x4d03, 0xff},
	{0x4d04, 0xff},
	{0x4d05, 0xff}, //temperature sensor
	{0x5000, 0x7e}, //slave/master AWB gain/statistics enable, BPC/WPC on
	{0x5001, 0x01}, //BLC on
	{0x5002, 0x08}, //H scale off, WBMATCH off, OTP_DPC off
	{0x5003, 0x20}, //; DPC_DBC buffer control enable, WB
	{0x5046, 0x12},
	{0x5901, 0x00}, //H skip off, V skip off
	{0x5e00, 0x00}, //test pattern off
	{0x5e01, 0x41}, //window cut enable
	{0x382d, 0x7f},
	{0x4825, 0x3a}, //lpx_p_min
	{0x4826, 0x40}, //hs_prepare_min
	{0x4808, 0x25}, //wake up
	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 * max_framerate 30fps
 * mipi_datarate per lane 720Mbps
 */
static const struct regval ov8858_3264x2448_regs_r1a_4lane[] = {
	{0x0100, 0x00},
	{0x030f, 0x04}, //pll2_divsp
	{0x3501, 0x9a}, //exposure M
	{0x3502, 0x20}, //exposure L
	//{0x3508, 0x02}, //gain H
	{0x3700, 0x30},
	{0x3701, 0x18},
	{0x3702, 0x50},
	{0x3703, 0x32},
	{0x3704, 0x28},
	{0x3706, 0x6a},
	{0x3707, 0x08},
	{0x3708, 0x48},
	{0x3709, 0x66},
	{0x370a, 0x01},
	{0x370b, 0x6a},
	{0x370c, 0x07},
	{0x3718, 0x14},
	{0x3712, 0x44},
	{0x371e, 0x31},
	{0x371f, 0x7f},
	{0x3720, 0x0a},
	{0x3721, 0x0a},
	{0x3724, 0x0c},
	{0x3725, 0x02},
	{0x3726, 0x0c},
	{0x3728, 0x0a},
	{0x3729, 0x03},
	{0x372a, 0x06},
	{0x372b, 0xa6},
	{0x372c, 0xa6},
	{0x372d, 0xa6},
	{0x372e, 0x0c},
	{0x372f, 0x20},
	{0x3730, 0x02},
	{0x3731, 0x0c},
	{0x3732, 0x28},
	{0x3736, 0x30},
	{0x373a, 0x0a},
	{0x373b, 0x0b},
	{0x373c, 0x14},
	{0x373e, 0x06},
	{0x375a, 0x0c},
	{0x375b, 0x26},
	{0x375d, 0x04},
	{0x375f, 0x28},
	{0x3772, 0x46},
	{0x3773, 0x04},
	{0x3774, 0x2c},
	{0x3775, 0x13},
	{0x3776, 0x08},
	{0x3778, 0x16},
	{0x37a0, 0x88},
	{0x37a1, 0x7a},
	{0x37a2, 0x7a},
	{0x37a7, 0x88},
	{0x37a8, 0x98},
	{0x37a9, 0x98},
	{0x37aa, 0x88},
	{0x37ab, 0x5c},
	{0x37ac, 0x5c},
	{0x37ad, 0x55},
	{0x37ae, 0x19},
	{0x37af, 0x19},
	{0x37b3, 0x84},
	{0x37b4, 0x84},
	{0x37b5, 0x66},
	{0x3808, 0x0c}, //x output size H
	{0x3809, 0xc0}, //x output size L
	{0x380a, 0x09}, //y output size H
	{0x380b, 0x90}, //y output size L
	{0x380c, 0x07}, //HTS H
	{0x380d, 0x94}, //HTS L
	{0x380e, 0x09}, //VTS H
	{0x380f, 0xaa}, //VTS L
	{0x3814, 0x01}, //x odd inc
	{0x3821, 0x46}, //mirror on, bin off
	{0x382a, 0x01}, //y odd inc
	{0x3830, 0x06},
	{0x3836, 0x01},
	{0x3f08, 0x08},
	{0x3f0a, 0x00},
	{0x4001, 0x00}, //total 256 black column
	{0x4022, 0x0b}, //Anchor left end H
	{0x4023, 0xc3}, //Anchor left end L
	{0x4024, 0x0c}, //Anchor right start H
	{0x4025, 0x36}, //Anchor right start L
	{0x4026, 0x0c}, //Anchor right end H
	{0x4027, 0x37}, //Anchor right end L
	{0x402b, 0x08}, //top black line number
	{0x402e, 0x0c}, //bottom black line start
	{0x4500, 0x58},
	{0x4600, 0x01},
	{0x4601, 0x97},
	{0x382d, 0xff},
	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 */
static const struct regval ov8858_global_regs_r2a_2lane[] = {
	// MIPI=720Mbps, SysClk=144Mhz,Dac Clock=360Mhz.
	//
	//
	// v00_01_00 (05/29/2014) : initial setting
	//
	// AM19 : 3617 <- 0xC0
	//
	// AM20 : change FWC_6K_EN to be default 0x3618=0x5a
	{0x0103, 0x01},// software reset for OVTATool only
	{0x0103, 0x01},// software reset
	{0x0100, 0x00},// software standby
	{0x0302, 0x1e},// pll1_multi
	{0x0303, 0x00},// pll1_divm
	{0x0304, 0x03},// pll1_div_mipi
	{0x030e, 0x02},// pll2_rdiv
	{0x030f, 0x04},// pll2_divsp
	{0x0312, 0x03},// pll2_pre_div0, pll2_r_divdac
	{0x031e, 0x0c},// pll1_no_lat
	{0x3600, 0x00},
	{0x3601, 0x00},
	{0x3602, 0x00},
	{0x3603, 0x00},
	{0x3604, 0x22},
	{0x3605, 0x20},
	{0x3606, 0x00},
	{0x3607, 0x20},
	{0x3608, 0x11},
	{0x3609, 0x28},
	{0x360a, 0x00},
	{0x360b, 0x05},
	{0x360c, 0xd4},
	{0x360d, 0x40},
	{0x360e, 0x0c},
	{0x360f, 0x20},
	{0x3610, 0x07},
	{0x3611, 0x20},
	{0x3612, 0x88},
	{0x3613, 0x80},
	{0x3614, 0x58},
	{0x3615, 0x00},
	{0x3616, 0x4a},
	{0x3617, 0x90},
	{0x3618, 0x5a},
	{0x3619, 0x70},
	{0x361a, 0x99},
	{0x361b, 0x0a},
	{0x361c, 0x07},
	{0x361d, 0x00},
	{0x361e, 0x00},
	{0x361f, 0x00},
	{0x3638, 0xff},
	{0x3633, 0x0f},
	{0x3634, 0x0f},
	{0x3635, 0x0f},
	{0x3636, 0x12},
	{0x3645, 0x13},
	{0x3646, 0x83},
	{0x364a, 0x07},
	{0x3015, 0x00},
	{0x3018, 0x32}, // MIPI 2 lane
	{0x3020, 0x93}, // Clock switch output normal, pclk_div =/1
	{0x3022, 0x01}, // pd_mipi enable when rst_sync
	{0x3031, 0x0a}, // MIPI 10-bit mode
	{0x3034, 0x00}, //
	{0x3106, 0x01}, // sclk_div, sclk_pre_div
	{0x3305, 0xf1},
	{0x3308, 0x00},
	{0x3309, 0x28},
	{0x330a, 0x00},
	{0x330b, 0x20},
	{0x330c, 0x00},
	{0x330d, 0x00},
	{0x330e, 0x00},
	{0x330f, 0x40},
	{0x3307, 0x04},
	{0x3500, 0x00}, // exposure H
	{0x3501, 0x4d}, // exposure M
	{0x3502, 0x40}, // exposure L
	{0x3503, 0x80}, // gain delay ?, exposure delay 1 frame, real gain
	{0x3505, 0x80}, // gain option
	{0x3508, 0x02}, // gain H
	{0x3509, 0x00}, // gain L
	{0x350c, 0x00}, // short gain H
	{0x350d, 0x80}, // short gain L
	{0x3510, 0x00}, // short exposure H
	{0x3511, 0x02}, // short exposure M
	{0x3512, 0x00}, // short exposure L
	{0x3700, 0x18},
	{0x3701, 0x0c},
	{0x3702, 0x28},
	{0x3703, 0x19},
	{0x3704, 0x14},
	{0x3705, 0x00},
	{0x3706, 0x82},
	{0x3707, 0x04},
	{0x3708, 0x24},
	{0x3709, 0x33},
	{0x370a, 0x01},
	{0x370b, 0x82},
	{0x370c, 0x04},
	{0x3718, 0x12},
	{0x3719, 0x31},
	{0x3712, 0x42},
	{0x3714, 0x24},
	{0x371e, 0x19},
	{0x371f, 0x40},
	{0x3720, 0x05},
	{0x3721, 0x05},
	{0x3724, 0x06},
	{0x3725, 0x01},
	{0x3726, 0x06},
	{0x3728, 0x05},
	{0x3729, 0x02},
	{0x372a, 0x03},
	{0x372b, 0x53},
	{0x372c, 0xa3},
	{0x372d, 0x53},
	{0x372e, 0x06},
	{0x372f, 0x10},
	{0x3730, 0x01},
	{0x3731, 0x06},
	{0x3732, 0x14},
	{0x3733, 0x10},
	{0x3734, 0x40},
	{0x3736, 0x20},
	{0x373a, 0x05},
	{0x373b, 0x06},
	{0x373c, 0x0a},
	{0x373e, 0x03},
	{0x3750, 0x0a},
	{0x3751, 0x0e},
	{0x3755, 0x10},
	{0x3758, 0x00},
	{0x3759, 0x4c},
	{0x375a, 0x06},
	{0x375b, 0x13},
	{0x375c, 0x20},
	{0x375d, 0x02},
	{0x375e, 0x00},
	{0x375f, 0x14},
	{0x3768, 0x22},
	{0x3769, 0x44},
	{0x376a, 0x44},
	{0x3761, 0x00},
	{0x3762, 0x00},
	{0x3763, 0x00},
	{0x3766, 0xff},
	{0x376b, 0x00},
	{0x3772, 0x23},
	{0x3773, 0x02},
	{0x3774, 0x16},
	{0x3775, 0x12},
	{0x3776, 0x04},
	{0x3777, 0x00},
	{0x3778, 0x17},
	{0x37a0, 0x44},
	{0x37a1, 0x3d},
	{0x37a2, 0x3d},
	{0x37a3, 0x00},
	{0x37a4, 0x00},
	{0x37a5, 0x00},
	{0x37a6, 0x00},
	{0x37a7, 0x44},
	{0x37a8, 0x4c},
	{0x37a9, 0x4c},
	{0x3760, 0x00},
	{0x376f, 0x01},
	{0x37aa, 0x44},
	{0x37ab, 0x2e},
	{0x37ac, 0x2e},
	{0x37ad, 0x33},
	{0x37ae, 0x0d},
	{0x37af, 0x0d},
	{0x37b0, 0x00},
	{0x37b1, 0x00},
	{0x37b2, 0x00},
	{0x37b3, 0x42},
	{0x37b4, 0x42},
	{0x37b5, 0x31},
	{0x37b6, 0x00},
	{0x37b7, 0x00},
	{0x37b8, 0x00},
	{0x37b9, 0xff},
	{0x3800, 0x00}, // x start H
	{0x3801, 0x0c}, // x start L
	{0x3802, 0x00}, // y start H
	{0x3803, 0x0c}, // y start L
	{0x3804, 0x0c}, // x end H
	{0x3805, 0xd3}, // x end L
	{0x3806, 0x09}, // y end H
	{0x3807, 0xa3}, // y end L
	{0x3808, 0x06}, // x output size H
	{0x3809, 0x60}, // x output size L
	{0x380a, 0x04}, // y output size H
	{0x380b, 0xc8}, // y output size L
	{0x380c, 0x07}, // HTS H
	{0x380d, 0x88}, // HTS L
	{0x380e, 0x04}, // VTS H
	{0x380f, 0xdc}, // VTS L
	{0x3810, 0x00}, // ISP x win H
	{0x3811, 0x04}, // ISP x win L
	{0x3813, 0x02}, // ISP y win L
	{0x3814, 0x03}, // x odd inc
	{0x3815, 0x01}, // x even inc
	{0x3820, 0x00}, // vflip off
	{0x3821, 0x67}, // mirror on, bin on
	{0x382a, 0x03}, // y odd inc
	{0x382b, 0x01}, // y even inc
	{0x3830, 0x08}, //
	{0x3836, 0x02}, //
	{0x3837, 0x18}, //
	{0x3841, 0xff}, // window auto size enable
	{0x3846, 0x48}, //
	{0x3d85, 0x16}, // OTP power up load data enable
	{0x3d8c, 0x73}, // OTP setting start High
	{0x3d8d, 0xde}, // OTP setting start Low
	{0x3f08, 0x08}, //
	{0x3f0a, 0x00}, //
	{0x4000, 0xf1}, // out_range_trig, format_chg_trig
	{0x4001, 0x10}, // total 128 black column
	{0x4005, 0x10}, // BLC target L
	{0x4002, 0x27}, // value used to limit BLC offset
	{0x4009, 0x81}, // final BLC offset limitation enable
	{0x400b, 0x0c}, // DCBLC on, DCBLC manual mode on
	{0x401b, 0x00}, // zero line R coefficient
	{0x401d, 0x00}, // zoro line T coefficient
	{0x4020, 0x00}, // Anchor left start H
	{0x4021, 0x04}, // Anchor left start L
	{0x4022, 0x06}, // Anchor left end H
	{0x4023, 0x00}, // Anchor left end L
	{0x4024, 0x0f}, // Anchor right start H
	{0x4025, 0x2a}, // Anchor right start L
	{0x4026, 0x0f}, // Anchor right end H
	{0x4027, 0x2b}, // Anchor right end L
	{0x4028, 0x00}, // top zero line start
	{0x4029, 0x02}, // top zero line number
	{0x402a, 0x04}, // top black line start
	{0x402b, 0x04}, // top black line number
	{0x402c, 0x00}, // bottom zero line start
	{0x402d, 0x02}, // bottom zoro line number
	{0x402e, 0x04}, // bottom black line start
	{0x402f, 0x04}, // bottom black line number
	{0x401f, 0x00}, // interpolation x/y disable, Anchor one disable
	{0x4034, 0x3f}, //
	{0x403d, 0x04}, // md_precision_en
	{0x4300, 0xff}, // clip max H
	{0x4301, 0x00}, // clip min H
	{0x4302, 0x0f}, // clip min L, clip max L
	{0x4316, 0x00}, //
	{0x4500, 0x58}, //
	{0x4503, 0x18}, //
	{0x4600, 0x00}, //
	{0x4601, 0xcb}, //
	{0x481f, 0x32}, // clk prepare min
	{0x4837, 0x16}, // global timing
	{0x4850, 0x10}, // lane 1 = 1, lane 0 = 0
	{0x4851, 0x32}, // lane 3 = 3, lane 2 = 2
	{0x4b00, 0x2a}, //
	{0x4b0d, 0x00}, //
	{0x4d00, 0x04}, // temperature sensor
	{0x4d01, 0x18}, //
	{0x4d02, 0xc3}, //
	{0x4d03, 0xff}, //
	{0x4d04, 0xff}, //
	{0x4d05, 0xff}, // temperature sensor
	{0x5000, 0xfe}, // lenc on, slave/master AWB gain/statistics enable
	{0x5001, 0x01}, // BLC on
	{0x5002, 0x08}, // H scale off, WBMATCH off, OTP_DPC
	{0x5003, 0x20}, // DPC_DBC buffer control enable, WB
	{0x5046, 0x12}, //
	{0x5780, 0x3e}, // DPC
	{0x5781, 0x0f}, //
	{0x5782, 0x44}, //
	{0x5783, 0x02}, //
	{0x5784, 0x01}, //
	{0x5785, 0x00}, //
	{0x5786, 0x00}, //
	{0x5787, 0x04}, //
	{0x5788, 0x02}, //
	{0x5789, 0x0f}, //
	{0x578a, 0xfd}, //
	{0x578b, 0xf5}, //
	{0x578c, 0xf5}, //
	{0x578d, 0x03}, //
	{0x578e, 0x08}, //
	{0x578f, 0x0c}, //
	{0x5790, 0x08}, //
	{0x5791, 0x04}, //
	{0x5792, 0x00}, //
	{0x5793, 0x52}, //
	{0x5794, 0xa3}, // DPC
	{0x5871, 0x0d}, // Lenc
	{0x5870, 0x18}, //
	{0x586e, 0x10}, //
	{0x586f, 0x08}, //
	{0x58f7, 0x01}, //
	{0x58f8, 0x3d}, // Lenc
	{0x5901, 0x00}, // H skip off, V skip off
	{0x5b00, 0x02}, // OTP DPC start address
	{0x5b01, 0x10}, // OTP DPC start address
	{0x5b02, 0x03}, // OTP DPC end address
	{0x5b03, 0xcf}, // OTP DPC end address
	{0x5b05, 0x6c}, // recover method = 2b11,
	{0x5e00, 0x00}, // use 0x3ff to test pattern off
	{0x5e01, 0x41}, // window cut enable
	{0x382d, 0x7f}, //
	{0x4825, 0x3a}, // lpx_p_min
	{0x4826, 0x40}, // hs_prepare_min
	{0x4808, 0x25}, // wake up delay in 1/1024 s
	{0x3763, 0x18}, //
	{0x3768, 0xcc}, //
	{0x470b, 0x28}, //
	{0x4202, 0x00}, //
	{0x400d, 0x10}, // BLC offset trigger L
	{0x4040, 0x04}, // BLC gain th2
	{0x403e, 0x04}, // BLC gain th1
	{0x4041, 0xc6}, // BLC
	{0x3007, 0x80},
	{0x400a, 0x01},
	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 * max_framerate 30fps
 * mipi_datarate per lane 720Mbps
 */
static const struct regval ov8858_1632x1224_regs_r2a_2lane[] = {
	// MIPI=720Mbps, SysClk=144Mhz,Dac Clock=360Mhz.
	//
	// MIPI=720Mbps, SysClk=144Mhz,Dac Clock=360Mhz.
	//
	//
	// v00_01_00 (05/29/2014) : initial setting
	//
	// AM19 : 3617 <- 0xC0
	//
	// AM20 : change FWC_6K_EN to be default 0x3618=0x5a
	{0x0100, 0x00},
	{0x3501, 0x4d}, // exposure M
	{0x3502, 0x40}, // exposure L
	{0x3778, 0x17}, //
	{0x3808, 0x06}, // x output size H
	{0x3809, 0x60}, // x output size L
	{0x380a, 0x04}, // y output size H
	{0x380b, 0xc8}, // y output size L
	{0x380c, 0x07}, // HTS H
	{0x380d, 0x88}, // HTS L
	{0x380e, 0x04}, // VTS H
	{0x380f, 0xdc}, // VTS L
	{0x3814, 0x03}, // x odd inc
	{0x3821, 0x67}, // mirror on, bin on
	{0x382a, 0x03}, // y odd inc
	{0x3830, 0x08},
	{0x3836, 0x02},
	{0x3f0a, 0x00},
	{0x4001, 0x10}, // total 128 black column
	{0x4022, 0x06}, // Anchor left end H
	{0x4023, 0x00}, // Anchor left end L
	{0x4025, 0x2a}, // Anchor right start L
	{0x4027, 0x2b}, // Anchor right end L
	{0x402b, 0x04}, // top black line number
	{0x402f, 0x04}, // bottom black line number
	{0x4500, 0x58},
	{0x4600, 0x00},
	{0x4601, 0xcb},
	{0x382d, 0x7f},
	{0x0100, 0x01},
	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 * max_framerate 15fps
 * mipi_datarate per lane 720Mbps
 */
static const struct regval ov8858_3264x2448_regs_r2a_2lane[] = {
	{0x0100, 0x00},
	{0x3501, 0x9a},// exposure M
	{0x3502, 0x20},// exposure L
	{0x3778, 0x1a},//
	{0x3808, 0x0c},// x output size H
	{0x3809, 0xc0},// x output size L
	{0x380a, 0x09},// y output size H
	{0x380b, 0x90},// y output size L
	{0x380c, 0x07},// HTS H
	{0x380d, 0x94},// HTS L
	{0x380e, 0x09},// VTS H
	{0x380f, 0xaa},// VTS L
	{0x3814, 0x01},// x odd inc
	{0x3821, 0x46},// mirror on, bin off
	{0x382a, 0x01},// y odd inc
	{0x3830, 0x06},
	{0x3836, 0x01},
	{0x3f0a, 0x00},
	{0x4001, 0x00},// total 256 black column
	{0x4022, 0x0c},// Anchor left end H
	{0x4023, 0x60},// Anchor left end L
	{0x4025, 0x36},// Anchor right start L
	{0x4027, 0x37},// Anchor right end L
	{0x402b, 0x08},// top black line number
	{0x402f, 0x08},// bottom black line number
	{0x4500, 0x58},
	{0x4600, 0x01},
	{0x4601, 0x97},
	{0x382d, 0xff},
	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 */
static const struct regval ov8858_global_regs_r2a_4lane[] = {
	//
	// MIPI=720Mbps, SysClk=144Mhz,Dac Clock=360Mhz.
	//
	// v00_01_00 (05/29/2014) : initial setting
	//
	// AM19 : 3617 <- 0xC0
	//
	// AM20 : change FWC_6K_EN to be default 0x3618=0x5a
	{0x0103, 0x01}, // software reset for OVTATool only
	{0x0103, 0x01}, // software reset
	{0x0100, 0x00}, // software standby
	{0x0302, 0x1e}, // pll1_multi
	{0x0303, 0x00}, // pll1_divm
	{0x0304, 0x03}, // pll1_div_mipi
	{0x030e, 0x00}, // pll2_rdiv
	{0x030f, 0x04}, // pll2_divsp
	{0x0312, 0x01}, // pll2_pre_div0, pll2_r_divdac
	{0x031e, 0x0c}, // pll1_no_lat
	{0x3600, 0x00},
	{0x3601, 0x00},
	{0x3602, 0x00},
	{0x3603, 0x00},
	{0x3604, 0x22},
	{0x3605, 0x20},
	{0x3606, 0x00},
	{0x3607, 0x20},
	{0x3608, 0x11},
	{0x3609, 0x28},
	{0x360a, 0x00},
	{0x360b, 0x05},
	{0x360c, 0xd4},
	{0x360d, 0x40},
	{0x360e, 0x0c},
	{0x360f, 0x20},
	{0x3610, 0x07},
	{0x3611, 0x20},
	{0x3612, 0x88},
	{0x3613, 0x80},
	{0x3614, 0x58},
	{0x3615, 0x00},
	{0x3616, 0x4a},
	{0x3617, 0x90},
	{0x3618, 0x5a},
	{0x3619, 0x70},
	{0x361a, 0x99},
	{0x361b, 0x0a},
	{0x361c, 0x07},
	{0x361d, 0x00},
	{0x361e, 0x00},
	{0x361f, 0x00},
	{0x3638, 0xff},
	{0x3633, 0x0f},
	{0x3634, 0x0f},
	{0x3635, 0x0f},
	{0x3636, 0x12},
	{0x3645, 0x13},
	{0x3646, 0x83},
	{0x364a, 0x07},
	{0x3015, 0x01}, //
	{0x3018, 0x72}, // MIPI 4 lane
	{0x3020, 0x93}, // Clock switch output normal, pclk_div =/1
	{0x3022, 0x01}, // pd_mipi enable when rst_sync
	{0x3031, 0x0a}, // MIPI 10-bit mode
	{0x3034, 0x00}, //
	{0x3106, 0x01}, // sclk_div, sclk_pre_div
	{0x3305, 0xf1},
	{0x3308, 0x00},
	{0x3309, 0x28},
	{0x330a, 0x00},
	{0x330b, 0x20},
	{0x330c, 0x00},
	{0x330d, 0x00},
	{0x330e, 0x00},
	{0x330f, 0x40},
	{0x3307, 0x04},
	{0x3500, 0x00}, // exposure H
	{0x3501, 0x4d}, // exposure M
	{0x3502, 0x40}, // exposure L
	{0x3503, 0x80}, // gain delay ?, exposure delay 1 frame, real gain
	{0x3505, 0x80}, // gain option
	{0x3508, 0x04}, // gain H
	{0x3509, 0x00}, // gain L
	{0x350c, 0x00}, // short gain H
	{0x350d, 0x80}, // short gain L
	{0x3510, 0x00}, // short exposure H
	{0x3511, 0x02}, // short exposure M
	{0x3512, 0x00}, // short exposure L
	{0x3700, 0x30},
	{0x3701, 0x18},
	{0x3702, 0x50},
	{0x3703, 0x32},
	{0x3704, 0x28},
	{0x3705, 0x00},
	{0x3706, 0x82},
	{0x3707, 0x08},
	{0x3708, 0x48},
	{0x3709, 0x66},
	{0x370a, 0x01},
	{0x370b, 0x82},
	{0x370c, 0x07},
	{0x3718, 0x14},
	{0x3719, 0x31},
	{0x3712, 0x44},
	{0x3714, 0x24},
	{0x371e, 0x31},
	{0x371f, 0x7f},
	{0x3720, 0x0a},
	{0x3721, 0x0a},
	{0x3724, 0x0c},
	{0x3725, 0x02},
	{0x3726, 0x0c},
	{0x3728, 0x0a},
	{0x3729, 0x03},
	{0x372a, 0x06},
	{0x372b, 0xa6},
	{0x372c, 0xa6},
	{0x372d, 0xa6},
	{0x372e, 0x0c},
	{0x372f, 0x20},
	{0x3730, 0x02},
	{0x3731, 0x0c},
	{0x3732, 0x28},
	{0x3733, 0x10},
	{0x3734, 0x40},
	{0x3736, 0x30},
	{0x373a, 0x0a},
	{0x373b, 0x0b},
	{0x373c, 0x14},
	{0x373e, 0x06},
	{0x3750, 0x0a},
	{0x3751, 0x0e},
	{0x3755, 0x10},
	{0x3758, 0x00},
	{0x3759, 0x4c},
	{0x375a, 0x0c},
	{0x375b, 0x26},
	{0x375c, 0x20},
	{0x375d, 0x04},
	{0x375e, 0x00},
	{0x375f, 0x28},
	{0x3768, 0x22},
	{0x3769, 0x44},
	{0x376a, 0x44},
	{0x3761, 0x00},
	{0x3762, 0x00},
	{0x3763, 0x00},
	{0x3766, 0xff},
	{0x376b, 0x00},
	{0x3772, 0x46},
	{0x3773, 0x04},
	{0x3774, 0x2c},
	{0x3775, 0x13},
	{0x3776, 0x08},
	{0x3777, 0x00},
	{0x3778, 0x17},
	{0x37a0, 0x88},
	{0x37a1, 0x7a},
	{0x37a2, 0x7a},
	{0x37a3, 0x00},
	{0x37a4, 0x00},
	{0x37a5, 0x00},
	{0x37a6, 0x00},
	{0x37a7, 0x88},
	{0x37a8, 0x98},
	{0x37a9, 0x98},
	{0x3760, 0x00},
	{0x376f, 0x01},
	{0x37aa, 0x88},
	{0x37ab, 0x5c},
	{0x37ac, 0x5c},
	{0x37ad, 0x55},
	{0x37ae, 0x19},
	{0x37af, 0x19},
	{0x37b0, 0x00},
	{0x37b1, 0x00},
	{0x37b2, 0x00},
	{0x37b3, 0x84},
	{0x37b4, 0x84},
	{0x37b5, 0x60},
	{0x37b6, 0x00},
	{0x37b7, 0x00},
	{0x37b8, 0x00},
	{0x37b9, 0xff},
	{0x3800, 0x00}, // x start H
	{0x3801, 0x0c}, // x start L
	{0x3802, 0x00}, // y start H
	{0x3803, 0x0c}, // y start L
	{0x3804, 0x0c}, // x end H
	{0x3805, 0xd3}, // x end L
	{0x3806, 0x09}, // y end H
	{0x3807, 0xa3}, // y end L
	{0x3808, 0x06}, // x output size H
	{0x3809, 0x60}, // x output size L
	{0x380a, 0x04}, // y output size H
	{0x380b, 0xc8}, // y output size L
	{0x380c, 0x07}, // HTS H
	{0x380d, 0x88}, // HTS L
	{0x380e, 0x04}, // VTS H
	{0x380f, 0xdc}, // VTS L
	{0x3810, 0x00}, // ISP x win H
	{0x3811, 0x04}, // ISP x win L
	{0x3813, 0x02}, // ISP y win L
	{0x3814, 0x03}, // x odd inc
	{0x3815, 0x01}, // x even inc
	{0x3820, 0x00}, // vflip off
	{0x3821, 0x67}, // mirror on, bin o
	{0x382a, 0x03}, // y odd inc
	{0x382b, 0x01}, // y even inc
	{0x3830, 0x08},
	{0x3836, 0x02},
	{0x3837, 0x18},
	{0x3841, 0xff}, // window auto size enable
	{0x3846, 0x48}, //
	{0x3d85, 0x16}, // OTP power up load data/setting enable enable
	{0x3d8c, 0x73}, // OTP setting start High
	{0x3d8d, 0xde}, // OTP setting start Low
	{0x3f08, 0x10}, //
	{0x3f0a, 0x00}, //
	{0x4000, 0xf1}, // out_range/format_chg/gain/exp_chg trig enable
	{0x4001, 0x10}, // total 128 black column
	{0x4005, 0x10}, // BLC target L
	{0x4002, 0x27}, // value used to limit BLC offset
	{0x4009, 0x81}, // final BLC offset limitation enable
	{0x400b, 0x0c}, // DCBLC on, DCBLC manual mode on
	{0x401b, 0x00}, // zero line R coefficient
	{0x401d, 0x00}, // zoro line T coefficient
	{0x4020, 0x00}, // Anchor left start H
	{0x4021, 0x04}, // Anchor left start L
	{0x4022, 0x06}, // Anchor left end H
	{0x4023, 0x00}, // Anchor left end L
	{0x4024, 0x0f}, // Anchor right start H
	{0x4025, 0x2a}, // Anchor right start L
	{0x4026, 0x0f}, // Anchor right end H
	{0x4027, 0x2b}, // Anchor right end L
	{0x4028, 0x00}, // top zero line start
	{0x4029, 0x02}, // top zero line number
	{0x402a, 0x04}, // top black line start
	{0x402b, 0x04}, // top black line number
	{0x402c, 0x00}, // bottom zero line start
	{0x402d, 0x02}, // bottom zoro line number
	{0x402e, 0x04}, // bottom black line start
	{0x402f, 0x04}, // bottom black line number
	{0x401f, 0x00}, // interpolation x/y disable, Anchor one disable
	{0x4034, 0x3f},
	{0x403d, 0x04}, // md_precision_en
	{0x4300, 0xff}, // clip max H
	{0x4301, 0x00}, // clip min H
	{0x4302, 0x0f}, // clip min L, clip max L
	{0x4316, 0x00},
	{0x4500, 0x58},
	{0x4503, 0x18},
	{0x4600, 0x00},
	{0x4601, 0xcb},
	{0x481f, 0x32}, // clk prepare min
	{0x4837, 0x16}, // global timing
	{0x4850, 0x10}, // lane 1 = 1, lane 0 = 0
	{0x4851, 0x32}, // lane 3 = 3, lane 2 = 2
	{0x4b00, 0x2a},
	{0x4b0d, 0x00},
	{0x4d00, 0x04}, // temperature sensor
	{0x4d01, 0x18}, //
	{0x4d02, 0xc3}, //
	{0x4d03, 0xff}, //
	{0x4d04, 0xff}, //
	{0x4d05, 0xff}, // temperature sensor
	{0x5000, 0xfe}, // lenc on, slave/master AWB gain/statistics enable
	{0x5001, 0x01}, // BLC on
	{0x5002, 0x08}, // WBMATCH sensor's gain, H scale/WBMATCH/OTP_DPC off
	{0x5003, 0x20}, // DPC_DBC buffer control enable, WB
	{0x5046, 0x12}, //
	{0x5780, 0x3e}, // DPC
	{0x5781, 0x0f}, //
	{0x5782, 0x44}, //
	{0x5783, 0x02}, //
	{0x5784, 0x01}, //
	{0x5785, 0x00}, //
	{0x5786, 0x00}, //
	{0x5787, 0x04}, //
	{0x5788, 0x02}, //
	{0x5789, 0x0f}, //
	{0x578a, 0xfd}, //
	{0x578b, 0xf5}, //
	{0x578c, 0xf5}, //
	{0x578d, 0x03}, //
	{0x578e, 0x08}, //
	{0x578f, 0x0c}, //
	{0x5790, 0x08}, //
	{0x5791, 0x04}, //
	{0x5792, 0x00}, //
	{0x5793, 0x52}, //
	{0x5794, 0xa3}, // DPC
	{0x5871, 0x0d}, // Lenc
	{0x5870, 0x18}, //
	{0x586e, 0x10}, //
	{0x586f, 0x08}, //
	{0x58f7, 0x01}, //
	{0x58f8, 0x3d}, // Lenc
	{0x5901, 0x00}, // H skip off, V skip off
	{0x5b00, 0x02}, // OTP DPC start address
	{0x5b01, 0x10}, // OTP DPC start address
	{0x5b02, 0x03}, // OTP DPC end address
	{0x5b03, 0xcf}, // OTP DPC end address
	{0x5b05, 0x6c}, // recover method = 2b11
	{0x5e00, 0x00}, // use 0x3ff to test pattern off
	{0x5e01, 0x41}, // window cut enable
	{0x382d, 0x7f}, //
	{0x4825, 0x3a}, // lpx_p_min
	{0x4826, 0x40}, // hs_prepare_min
	{0x4808, 0x25}, // wake up delay in 1/1024 s
	{0x3763, 0x18},
	{0x3768, 0xcc},
	{0x470b, 0x28},
	{0x4202, 0x00},
	{0x400d, 0x10}, // BLC offset trigger L
	{0x4040, 0x04}, // BLC gain th2
	{0x403e, 0x04}, // BLC gain th1
	{0x4041, 0xc6}, // BLC
	{0x3007, 0x80},
	{0x400a, 0x01},
	{REG_NULL, 0x00},
};

/*
 * Xclk 24Mhz
 * max_framerate 30fps
 * mipi_datarate per lane 720Mbps
 */
static const struct regval ov8858_3264x2448_regs_r2a_4lane[] = {
	{0x0100, 0x00},
	{0x3501, 0x9a}, // exposure M
	{0x3502, 0x20}, // exposure L
	{0x3508, 0x02}, // gain H
	{0x3808, 0x0c}, // x output size H
	{0x3809, 0xc0}, // x output size L
	{0x380a, 0x09}, // y output size H
	{0x380b, 0x90}, // y output size L
	{0x380c, 0x07}, // HTS H
	{0x380d, 0x94}, // HTS L
	{0x380e, 0x0a}, // VTS H
	{0x380f, 0x00}, // VTS L
	{0x3814, 0x01}, // x odd inc
	{0x3821, 0x46}, // mirror on, bin off
	{0x382a, 0x01}, // y odd inc
	{0x3830, 0x06},
	{0x3836, 0x01},
	{0x3f0a, 0x00},
	{0x4001, 0x00}, // total 256 black column
	{0x4022, 0x0c}, // Anchor left end H
	{0x4023, 0x60}, // Anchor left end L
	{0x4025, 0x36}, // Anchor right start L
	{0x4027, 0x37}, // Anchor right end L
	{0x402b, 0x08}, // top black line number
	{0x402f, 0x08}, // interpolation x/y disable, Anchor one disable
	{0x4500, 0x58},
	{0x4600, 0x01},
	{0x4601, 0x97},
	{0x382d, 0xff},
	{0x030d, 0x1f},
	{REG_NULL, 0x00},
};

static const struct ov8858_mode supported_modes_r1a_2lane[] = {
	{
		.width = 3264,
		.height = 2448,
		.max_fps = {
			.numerator = 10000,
			.denominator = 150000,
		},
		.exp_def = 0x09a0,
		.hts_def = 0x0794 * 2,
		.vts_def = 0x09aa,
		.reg_list = ov8858_3264x2448_regs_r1a_2lane,
	},
	{
		.width = 1632,
		.height = 1224,
		.max_fps = {
			.numerator = 10000,
			.denominator = 300000,
		},
		.exp_def = 0x04d0,
		.hts_def = 0x0788,
		.vts_def = 0x04dc,
		.reg_list = ov8858_1632x1224_regs_r1a_2lane,
	},
};

static const struct ov8858_mode supported_modes_r1a_4lane[] = {
	{
		.width = 3264,
		.height = 2448,
		.max_fps = {
			.numerator = 10000,
			.denominator = 300000,
		},
		.exp_def = 0x09a0,
		.hts_def = 0x0794 * 2,
		.vts_def = 0x09aa,
		.reg_list = ov8858_3264x2448_regs_r1a_4lane,
	},
};

static const struct ov8858_mode supported_modes_r2a_2lane[] = {
	{
		.width = 3264,
		.height = 2448,
		.max_fps = {
			.numerator = 10000,
			.denominator = 150000,
		},
		.exp_def = 0x09a0,
		.hts_def = 0x0794 * 2,
		.vts_def = 0x09aa,
		.reg_list = ov8858_3264x2448_regs_r2a_2lane,
	},
	{
		.width = 1632,
		.height = 1224,
		.max_fps = {
			.numerator = 10000,
			.denominator = 300000,
		},
		.exp_def = 0x04d0,
		.hts_def = 0x0788,
		.vts_def = 0x04dc,
		.reg_list = ov8858_1632x1224_regs_r2a_2lane,
	},
};

static const struct ov8858_mode supported_modes_r2a_4lane[] = {
	{
		.width = 3264,
		.height = 2448,
		.max_fps = {
			.numerator = 10000,
			.denominator = 300000,
		},
		.exp_def = 0x09a0,
		.hts_def = 0x0794 * 2,
		.vts_def = 0x0a00,
		.reg_list = ov8858_3264x2448_regs_r2a_4lane,
	},
};

static const struct ov8858_mode *supported_modes;

static const s64 link_freq_menu_items[] = {
	MIPI_FREQ
};

static const char * const ov8858_test_pattern_menu[] = {
	"Disabled",
	"Vertical Color Bar Type 1",
	"Vertical Color Bar Type 2",
	"Vertical Color Bar Type 3",
	"Vertical Color Bar Type 4"
};

/* Write registers up to 4 at a time */
static int ov8858_write_reg(struct i2c_client *client, u16 reg,
			    u32 len, u32 val)
{
	u32 buf_i, val_i;
	u8 buf[6];
	u8 *val_p;
	__be32 val_be;

	if (len > 4)
		return -EINVAL;

	buf[0] = reg >> 8;
	buf[1] = reg & 0xff;

	val_be = cpu_to_be32(val);
	val_p = (u8 *)&val_be;
	buf_i = 2;
	val_i = 4 - len;

	while (val_i < 4)
		buf[buf_i++] = val_p[val_i++];

	if (i2c_master_send(client, buf, len + 2) != len + 2)
		return -EIO;

	return 0;
}

static int ov8858_write_array(struct i2c_client *client,
			      const struct regval *regs)
{
	u32 i;
	int ret = 0;

	for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++)
		ret = ov8858_write_reg(client, regs[i].addr,
					OV8858_REG_VALUE_08BIT,
					regs[i].val);

	return ret;
}

/* Read registers up to 4 at a time */
static int ov8858_read_reg(struct i2c_client *client, u16 reg,
			   unsigned int len, u32 *val)
{
	struct i2c_msg msgs[2];
	u8 *data_be_p;
	__be32 data_be = 0;
	__be16 reg_addr_be = cpu_to_be16(reg);
	int ret;

	if (len > 4 || !len)
		return -EINVAL;

	data_be_p = (u8 *)&data_be;
	/* Write register address */
	msgs[0].addr = client->addr;
	msgs[0].flags = 0;
	msgs[0].len = 2;
	msgs[0].buf = (u8 *)&reg_addr_be;

	/* Read data from register */
	msgs[1].addr = client->addr;
	msgs[1].flags = I2C_M_RD;
	msgs[1].len = len;
	msgs[1].buf = &data_be_p[4 - len];

	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
	if (ret != ARRAY_SIZE(msgs))
		return -EIO;

	*val = be32_to_cpu(data_be);

	return 0;
}

static int ov8858_get_reso_dist(const struct ov8858_mode *mode,
				struct v4l2_mbus_framefmt *framefmt)
{
	return abs(mode->width - framefmt->width) +
	       abs(mode->height - framefmt->height);
}

static const struct ov8858_mode *
ov8858_find_best_fit(struct ov8858 *ov8858,
		     struct v4l2_subdev_format *fmt)
{
	struct v4l2_mbus_framefmt *framefmt = &fmt->format;
	int dist;
	int cur_best_fit = 0;
	int cur_best_fit_dist = -1;
	unsigned int i;

	for (i = 0; i < ov8858->cfg_num; i++) {
		dist = ov8858_get_reso_dist(&supported_modes[i], framefmt);
		if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) {
			cur_best_fit_dist = dist;
			cur_best_fit = i;
		}
	}

	return &supported_modes[cur_best_fit];
}

static int ov8858_set_fmt(struct v4l2_subdev *sd,
			  struct v4l2_subdev_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct ov8858 *ov8858 = to_ov8858(sd);
	const struct ov8858_mode *mode;
	s64 h_blank, vblank_def;

	mutex_lock(&ov8858->mutex);

	mode = ov8858_find_best_fit(ov8858, fmt);
	fmt->format.code = OV8858_MEDIA_BUS_FMT;
	fmt->format.width = mode->width;
	fmt->format.height = mode->height;
	fmt->format.field = V4L2_FIELD_NONE;
	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
		*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
#else
		mutex_unlock(&ov8858->mutex);
		return -ENOTTY;
#endif
	} else {
		ov8858->cur_mode = mode;
		h_blank = mode->hts_def - mode->width;
		__v4l2_ctrl_modify_range(ov8858->hblank, h_blank,
					 h_blank, 1, h_blank);
		vblank_def = mode->vts_def - mode->height;
		__v4l2_ctrl_modify_range(ov8858->vblank, vblank_def,
					 OV8858_VTS_MAX - mode->height,
					 1, vblank_def);
	}

	mutex_unlock(&ov8858->mutex);

	return 0;
}

static int ov8858_get_fmt(struct v4l2_subdev *sd,
			  struct v4l2_subdev_pad_config *cfg,
			  struct v4l2_subdev_format *fmt)
{
	struct ov8858 *ov8858 = to_ov8858(sd);
	const struct ov8858_mode *mode = ov8858->cur_mode;

	mutex_lock(&ov8858->mutex);
	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
		fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
#else
		mutex_unlock(&ov8858->mutex);
		return -ENOTTY;
#endif
	} else {
		fmt->format.width = mode->width;
		fmt->format.height = mode->height;
		fmt->format.code = OV8858_MEDIA_BUS_FMT;
		fmt->format.field = V4L2_FIELD_NONE;
	}
	mutex_unlock(&ov8858->mutex);

	return 0;
}

static int ov8858_enum_mbus_code(struct v4l2_subdev *sd,
				 struct v4l2_subdev_pad_config *cfg,
				 struct v4l2_subdev_mbus_code_enum *code)
{
	if (code->index != 0)
		return -EINVAL;
	code->code = OV8858_MEDIA_BUS_FMT;

	return 0;
}

static int ov8858_enum_frame_sizes(struct v4l2_subdev *sd,
				   struct v4l2_subdev_pad_config *cfg,
				   struct v4l2_subdev_frame_size_enum *fse)
{
	struct ov8858 *ov8858 = to_ov8858(sd);

	if (fse->index >= ov8858->cfg_num)
		return -EINVAL;

	if (fse->code != OV8858_MEDIA_BUS_FMT)
		return -EINVAL;

	fse->min_width  = supported_modes[fse->index].width;
	fse->max_width  = supported_modes[fse->index].width;
	fse->max_height = supported_modes[fse->index].height;
	fse->min_height = supported_modes[fse->index].height;

	return 0;
}

static int ov8858_enable_test_pattern(struct ov8858 *ov8858, u32 pattern)
{
	u32 val;

	if (pattern)
		val = (pattern - 1) | OV8858_TEST_PATTERN_ENABLE;
	else
		val = OV8858_TEST_PATTERN_DISABLE;

	return ov8858_write_reg(ov8858->client,
				 OV8858_REG_TEST_PATTERN,
				 OV8858_REG_VALUE_08BIT,
				 val);
}

static int ov8858_g_frame_interval(struct v4l2_subdev *sd,
				   struct v4l2_subdev_frame_interval *fi)
{
	struct ov8858 *ov8858 = to_ov8858(sd);
	const struct ov8858_mode *mode = ov8858->cur_mode;

	fi->interval = mode->max_fps;

	return 0;
}

static void ov8858_get_r1a_otp(struct ov8858_otp_info_r1a *otp_r1a,
			       struct rkmodule_inf *inf)
{
	u32 i, j;
	int rg, bg;

	/* fac */
	if (otp_r1a->flag & 0x80) {
		inf->fac.flag = 1;
		inf->fac.year = otp_r1a->year;
		inf->fac.month = otp_r1a->month;
		inf->fac.day = otp_r1a->day;

		for (i = 0; i < ARRAY_SIZE(ov8858_module_info) - 1; i++) {
			if (ov8858_module_info[i].id == otp_r1a->module_id)
				break;
		}
		strlcpy(inf->fac.module, ov8858_module_info[i].name,
			sizeof(inf->fac.module));

		for (i = 0; i < ARRAY_SIZE(ov8858_lens_info) - 1; i++) {
			if (ov8858_lens_info[i].id == otp_r1a->lens_id)
				break;
		}
		strlcpy(inf->fac.lens, ov8858_lens_info[i].name,
			sizeof(inf->fac.lens));
	}

	/* awb */
	if (otp_r1a->flag & 0x40) {
		if (otp_r1a->light_rg == 0)
			/* no light source information in OTP ,light factor = 1 */
			rg = otp_r1a->rg_ratio;
		else
			rg = otp_r1a->rg_ratio * (otp_r1a->light_rg + 512) / 1024;

		if (otp_r1a->light_bg == 0)
			/* no light source information in OTP ,light factor = 1 */
			bg = otp_r1a->bg_ratio;
		else
			bg = otp_r1a->bg_ratio * (otp_r1a->light_bg + 512) / 1024;

		inf->awb.flag = 1;
		inf->awb.r_value = rg;
		inf->awb.b_value = bg;
		inf->awb.gr_value = 0x200;
		inf->awb.gb_value = 0x200;

		inf->awb.golden_r_value = 0;
		inf->awb.golden_b_value = 0;
		inf->awb.golden_gr_value = 0;
		inf->awb.golden_gb_value = 0;
	}

	/* af */
	if (otp_r1a->flag & 0x20) {
		inf->af.flag = 1;
		inf->af.dir_cnt = 1;
		inf->af.af_otp[0].vcm_start = otp_r1a->vcm_start;
		inf->af.af_otp[0].vcm_end = otp_r1a->vcm_end;
		inf->af.af_otp[0].vcm_dir = otp_r1a->vcm_dir;
	}

	/* lsc */
	if (otp_r1a->flag & 0x10) {
		inf->lsc.flag = 1;
		inf->lsc.decimal_bits = 0;
		inf->lsc.lsc_w = 6;
		inf->lsc.lsc_h = 6;

		j = 0;
		for (i = 0; i < 36; i++) {
			inf->lsc.lsc_gr[i] = otp_r1a->lenc[j++];
			inf->lsc.lsc_gb[i] = inf->lsc.lsc_gr[i];
		}
		for (i = 0; i < 36; i++)
			inf->lsc.lsc_b[i] = otp_r1a->lenc[j++] + otp_r1a->lenc[108];
		for (i = 0; i < 36; i++)
			inf->lsc.lsc_r[i] = otp_r1a->lenc[j++] + otp_r1a->lenc[109];
	}
}

static void ov8858_get_r2a_otp(struct ov8858_otp_info_r2a *otp_r2a,
			       struct rkmodule_inf *inf)
{
	unsigned int i, j;
	int rg, bg;

	/* fac / awb */
	if (otp_r2a->flag & 0xC0) {
		inf->fac.flag = 1;
		inf->fac.year = otp_r2a->year;
		inf->fac.month = otp_r2a->month;
		inf->fac.day = otp_r2a->day;

		for (i = 0; i < ARRAY_SIZE(ov8858_module_info) - 1; i++) {
			if (ov8858_module_info[i].id == otp_r2a->module_id)
				break;
		}
		strlcpy(inf->fac.module, ov8858_module_info[i].name,
			sizeof(inf->fac.module));

		for (i = 0; i < ARRAY_SIZE(ov8858_lens_info) - 1; i++) {
			if (ov8858_lens_info[i].id == otp_r2a->lens_id)
				break;
		}
		strlcpy(inf->fac.lens, ov8858_lens_info[i].name,
			sizeof(inf->fac.lens));

		rg = otp_r2a->rg_ratio;
		bg = otp_r2a->bg_ratio;

		inf->awb.flag = 1;
		inf->awb.r_value = rg;
		inf->awb.b_value = bg;
		inf->awb.gr_value = 0x200;
		inf->awb.gb_value = 0x200;

		inf->awb.golden_r_value = 0;
		inf->awb.golden_b_value = 0;
		inf->awb.golden_gr_value = 0;
		inf->awb.golden_gb_value = 0;
	}

	/* af */
	if (otp_r2a->flag & 0x20) {
		inf->af.flag = 1;
		inf->af.dir_cnt = 1;
		inf->af.af_otp[0].vcm_start = otp_r2a->vcm_start;
		inf->af.af_otp[0].vcm_end = otp_r2a->vcm_end;
		inf->af.af_otp[0].vcm_dir = otp_r2a->vcm_dir;
	}

	/* lsc */
	if (otp_r2a->flag & 0x10) {
		inf->lsc.flag = 1;
		inf->lsc.decimal_bits = 0;
		inf->lsc.lsc_w = 8;
		inf->lsc.lsc_h = 10;

		j = 0;
		for (i = 0; i < 80; i++) {
			inf->lsc.lsc_gr[i] = otp_r2a->lenc[j++];
			inf->lsc.lsc_gb[i] = inf->lsc.lsc_gr[i];
		}
		for (i = 0; i < 80; i++)
			inf->lsc.lsc_b[i] = otp_r2a->lenc[j++];
		for (i = 0; i < 80; i++)
			inf->lsc.lsc_r[i] = otp_r2a->lenc[j++];
	}
}

static void ov8858_get_module_inf(struct ov8858 *ov8858,
				  struct rkmodule_inf *inf)
{
	struct ov8858_otp_info_r1a *otp_r1a = ov8858->otp_r1a;
	struct ov8858_otp_info_r2a *otp_r2a = ov8858->otp_r2a;

	strlcpy(inf->base.sensor, OV8858_NAME, sizeof(inf->base.sensor));
	strlcpy(inf->base.module, ov8858->module_name, sizeof(inf->base.module));
	strlcpy(inf->base.lens, ov8858->len_name, sizeof(inf->base.lens));

	if (ov8858->is_r2a) {
		if (otp_r2a)
			ov8858_get_r2a_otp(otp_r2a, inf);
	} else {
		if (otp_r1a)
			ov8858_get_r1a_otp(otp_r1a, inf);
	}
}

static void ov8858_set_awb_cfg(struct ov8858 *ov8858,
			       struct rkmodule_awb_cfg *cfg)
{
	mutex_lock(&ov8858->mutex);
	memcpy(&ov8858->awb_cfg, cfg, sizeof(*cfg));
	mutex_unlock(&ov8858->mutex);
}

static void ov8858_set_lsc_cfg(struct ov8858 *ov8858,
			       struct rkmodule_lsc_cfg *cfg)
{
	mutex_lock(&ov8858->mutex);
	memcpy(&ov8858->lsc_cfg, cfg, sizeof(*cfg));
	mutex_unlock(&ov8858->mutex);
}

static long ov8858_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
	struct ov8858 *ov8858 = to_ov8858(sd);
	long ret = 0;
	u32 stream = 0;

	switch (cmd) {
	case RKMODULE_GET_MODULE_INFO:
		ov8858_get_module_inf(ov8858, (struct rkmodule_inf *)arg);
		break;
	case RKMODULE_AWB_CFG:
		ov8858_set_awb_cfg(ov8858, (struct rkmodule_awb_cfg *)arg);
		break;
	case RKMODULE_LSC_CFG:
		ov8858_set_lsc_cfg(ov8858, (struct rkmodule_lsc_cfg *)arg);
		break;
	case RKMODULE_SET_QUICK_STREAM:

		stream = *((u32 *)arg);

		if (stream)
			ret = ov8858_write_reg(ov8858->client,
				OV8858_REG_CTRL_MODE,
				OV8858_REG_VALUE_08BIT,
				OV8858_MODE_STREAMING);
		else
			ret = ov8858_write_reg(ov8858->client,
				OV8858_REG_CTRL_MODE,
				OV8858_REG_VALUE_08BIT,
				OV8858_MODE_SW_STANDBY);
		break;
	default:
		ret = -ENOTTY;
		break;
	}

	return ret;
}

#ifdef CONFIG_COMPAT
static long ov8858_compat_ioctl32(struct v4l2_subdev *sd,
				  unsigned int cmd, unsigned long arg)
{
	void __user *up = compat_ptr(arg);
	struct rkmodule_inf *inf;
	struct rkmodule_awb_cfg *awb_cfg;
	struct rkmodule_lsc_cfg *lsc_cfg;
	long ret = 0;
	u32 stream = 0;

	switch (cmd) {
	case RKMODULE_GET_MODULE_INFO:
		inf = kzalloc(sizeof(*inf), GFP_KERNEL);
		if (!inf) {
			ret = -ENOMEM;
			return ret;
		}

		ret = ov8858_ioctl(sd, cmd, inf);
		if (!ret)
			ret = copy_to_user(up, inf, sizeof(*inf));
		kfree(inf);
		break;
	case RKMODULE_AWB_CFG:
		awb_cfg = kzalloc(sizeof(*awb_cfg), GFP_KERNEL);
		if (!awb_cfg) {
			ret = -ENOMEM;
			return ret;
		}

		ret = copy_from_user(awb_cfg, up, sizeof(*awb_cfg));
		if (!ret)
			ret = ov8858_ioctl(sd, cmd, awb_cfg);
		kfree(awb_cfg);
		break;
	case RKMODULE_LSC_CFG:
		lsc_cfg = kzalloc(sizeof(*lsc_cfg), GFP_KERNEL);
		if (!lsc_cfg) {
			ret = -ENOMEM;
			return ret;
		}

		ret = copy_from_user(lsc_cfg, up, sizeof(*lsc_cfg));
		if (!ret)
			ret = ov8858_ioctl(sd, cmd, lsc_cfg);
		kfree(lsc_cfg);
		break;
	case RKMODULE_SET_QUICK_STREAM:
		ret = copy_from_user(&stream, up, sizeof(u32));
		if (!ret)
			ret = ov8858_ioctl(sd, cmd, &stream);
		break;
	default:
		ret = -ENOTTY;
		break;
	}

	return ret;
}
#endif

/*--------------------------------------------------------------------------*/
static int ov8858_apply_otp_r1a(struct ov8858 *ov8858)
{
	int rg, bg, R_gain, G_gain, B_gain, base_gain, temp;
	struct i2c_client *client = ov8858->client;
	struct ov8858_otp_info_r1a *otp_ptr = ov8858->otp_r1a;
	struct rkmodule_awb_cfg *awb_cfg = &ov8858->awb_cfg;
	struct rkmodule_lsc_cfg *lsc_cfg = &ov8858->lsc_cfg;
	u32 golden_bg_ratio = 0;
	u32 golden_rg_ratio = 0;
	u32 golden_g_value = 0;
	u32 i;

	if (awb_cfg->enable) {
		golden_g_value = (awb_cfg->golden_gb_value +
				  awb_cfg->golden_gr_value) / 2;
		golden_bg_ratio = awb_cfg->golden_b_value * 0x200 / golden_g_value;
		golden_rg_ratio = awb_cfg->golden_r_value * 0x200 / golden_g_value;
	}

	/* apply OTP WB Calibration */
	if ((otp_ptr->flag & 0x40) && golden_bg_ratio && golden_rg_ratio) {
		if (otp_ptr->light_rg == 0)
			/*
			 * no light source information in OTP,
			 * light factor = 1
			 */
			rg = otp_ptr->rg_ratio;
		else
			rg = otp_ptr->rg_ratio *
			     (otp_ptr->light_rg + 512) / 1024;

		if (otp_ptr->light_bg == 0)
			/*
			 * no light source information in OTP,
			 * light factor = 1
			 */
			bg = otp_ptr->bg_ratio;
		else
			bg = otp_ptr->bg_ratio *
			     (otp_ptr->light_bg + 512) / 1024;

		/* calculate G gain */
		R_gain = (golden_rg_ratio * 1000) / rg;
		B_gain = (golden_bg_ratio * 1000) / bg;
		G_gain = 1000;
		if (R_gain < 1000 || B_gain < 1000) {
			if (R_gain < B_gain)
				base_gain = R_gain;
			else
				base_gain = B_gain;
		} else {
			base_gain = G_gain;
		}
		R_gain = 0x400 * R_gain / (base_gain);
		B_gain = 0x400 * B_gain / (base_gain);
		G_gain = 0x400 * G_gain / (base_gain);

		/* update sensor WB gain */
		if (R_gain > 0x400) {
			ov8858_write_1byte(client, 0x5032, R_gain >> 8);
			ov8858_write_1byte(client, 0x5033, R_gain & 0x00ff);
		}
		if (G_gain > 0x400) {
			ov8858_write_1byte(client, 0x5034, G_gain >> 8);
			ov8858_write_1byte(client, 0x5035, G_gain & 0x00ff);
		}
		if (B_gain > 0x400) {
			ov8858_write_1byte(client, 0x5036, B_gain >> 8);
			ov8858_write_1byte(client, 0x5037, B_gain & 0x00ff);
		}

		dev_dbg(&client->dev, "apply awb gain: 0x%x, 0x%x, 0x%x\n",
			R_gain, G_gain, B_gain);
	}

	/* apply OTP Lenc Calibration */
	if ((otp_ptr->flag & 0x10) && lsc_cfg->enable) {
		ov8858_read_1byte(client, 0x5000, &temp);
		temp = 0x80 | temp;
		ov8858_write_1byte(client, 0x5000, temp);
		for (i = 0; i < ARRAY_SIZE(otp_ptr->lenc); i++) {
			ov8858_write_1byte(client, 0x5800 + i,
					   otp_ptr->lenc[i]);
			dev_dbg(&client->dev, "apply lenc[%d]: 0x%x\n",
				i, otp_ptr->lenc[i]);
		}
	}

	return 0;
}

static int ov8858_apply_otp_r2a(struct ov8858 *ov8858)
{
	int rg, bg, R_gain, G_gain, B_gain, base_gain, temp;
	struct i2c_client *client = ov8858->client;
	struct ov8858_otp_info_r2a *otp_ptr = ov8858->otp_r2a;
	struct rkmodule_awb_cfg *awb_cfg = &ov8858->awb_cfg;
	struct rkmodule_lsc_cfg *lsc_cfg = &ov8858->lsc_cfg;
	u32 golden_bg_ratio = 0;
	u32 golden_rg_ratio = 0;
	u32 golden_g_value = 0;
	u32 i;

	if (awb_cfg->enable) {
		golden_g_value = (awb_cfg->golden_gb_value +
				  awb_cfg->golden_gr_value) / 2;
		golden_bg_ratio = awb_cfg->golden_b_value * 0x200 / golden_g_value;
		golden_rg_ratio = awb_cfg->golden_r_value * 0x200 / golden_g_value;
	}

	/* apply OTP WB Calibration */
	if ((otp_ptr->flag & 0xC0) && golden_bg_ratio && golden_rg_ratio) {
		rg = otp_ptr->rg_ratio;
		bg = otp_ptr->bg_ratio;
		/* calculate G gain */
		R_gain = (golden_rg_ratio * 1000) / rg;
		B_gain = (golden_bg_ratio * 1000) / bg;
		G_gain = 1000;
		if (R_gain < 1000 || B_gain < 1000) {
			if (R_gain < B_gain)
				base_gain = R_gain;
			else
				base_gain = B_gain;
		} else {
			base_gain = G_gain;
		}
		R_gain = 0x400 * R_gain / (base_gain);
		B_gain = 0x400 * B_gain / (base_gain);
		G_gain = 0x400 * G_gain / (base_gain);

		/* update sensor WB gain */
		if (R_gain > 0x400) {
			ov8858_write_1byte(client, 0x5032, R_gain >> 8);
			ov8858_write_1byte(client, 0x5033, R_gain & 0x00ff);
		}
		if (G_gain > 0x400) {
			ov8858_write_1byte(client, 0x5034, G_gain >> 8);
			ov8858_write_1byte(client, 0x5035, G_gain & 0x00ff);
		}
		if (B_gain > 0x400) {
			ov8858_write_1byte(client, 0x5036, B_gain >> 8);
			ov8858_write_1byte(client, 0x5037, B_gain & 0x00ff);
		}

		dev_dbg(&client->dev, "apply awb gain: 0x%x, 0x%x, 0x%x\n",
			R_gain, G_gain, B_gain);
	}

	/* apply OTP Lenc Calibration */
	if ((otp_ptr->flag & 0x10) && lsc_cfg->enable) {
		ov8858_read_1byte(client, 0x5000, &temp);
		temp = 0x80 | temp;
		ov8858_write_1byte(client, 0x5000, temp);
		for (i = 0; i < ARRAY_SIZE(otp_ptr->lenc); i++) {
			ov8858_write_1byte(client, 0x5800 + i,
					   otp_ptr->lenc[i]);
			dev_dbg(&client->dev, "apply lenc[%d]: 0x%x\n",
				i, otp_ptr->lenc[i]);
		}
	}

	return 0;
}

static int ov8858_apply_otp(struct ov8858 *ov8858)
{
	int ret = 0;

	if (ov8858->is_r2a && ov8858->otp_r2a)
		ret = ov8858_apply_otp_r2a(ov8858);
	else if (ov8858->otp_r1a)
		ret = ov8858_apply_otp_r1a(ov8858);

	return ret;
}

static int __ov8858_start_stream(struct ov8858 *ov8858)
{
	int ret;

	ret = ov8858_write_array(ov8858->client, ov8858->cur_mode->reg_list);
	if (ret)
		return ret;

	/* In case these controls are set before streaming */
	mutex_unlock(&ov8858->mutex);
	ret = v4l2_ctrl_handler_setup(&ov8858->ctrl_handler);
	mutex_lock(&ov8858->mutex);
	if (ret)
		return ret;

	ret = ov8858_apply_otp(ov8858);
	if (ret)
		return ret;

	return ov8858_write_reg(ov8858->client,
				OV8858_REG_CTRL_MODE,
				OV8858_REG_VALUE_08BIT,
				OV8858_MODE_STREAMING);
}

static int __ov8858_stop_stream(struct ov8858 *ov8858)
{
	return ov8858_write_reg(ov8858->client,
				OV8858_REG_CTRL_MODE,
				OV8858_REG_VALUE_08BIT,
				OV8858_MODE_SW_STANDBY);
}

static int ov8858_s_stream(struct v4l2_subdev *sd, int on)
{
	struct ov8858 *ov8858 = to_ov8858(sd);
	struct i2c_client *client = ov8858->client;
	int ret = 0;

	dev_info(&client->dev, "%s: on: %d, %dx%d@%d\n", __func__, on,
				ov8858->cur_mode->width,
				ov8858->cur_mode->height,
		DIV_ROUND_CLOSEST(ov8858->cur_mode->max_fps.denominator,
				  ov8858->cur_mode->max_fps.numerator));

	mutex_lock(&ov8858->mutex);
	on = !!on;
	if (on == ov8858->streaming)
		goto unlock_and_return;

	if (on) {
		ret = pm_runtime_get_sync(&client->dev);
		if (ret < 0) {
			pm_runtime_put_noidle(&client->dev);
			goto unlock_and_return;
		}

		ret = __ov8858_start_stream(ov8858);
		if (ret) {
			v4l2_err(sd, "start stream failed while write regs\n");
			pm_runtime_put(&client->dev);
			goto unlock_and_return;
		}
	} else {
		__ov8858_stop_stream(ov8858);
		pm_runtime_put(&client->dev);
	}

	ov8858->streaming = on;

unlock_and_return:
	mutex_unlock(&ov8858->mutex);

	return ret;
}

static int ov8858_s_power(struct v4l2_subdev *sd, int on)
{
	struct ov8858 *ov8858 = to_ov8858(sd);
	struct i2c_client *client = ov8858->client;
	int ret = 0;

	mutex_lock(&ov8858->mutex);

	/* If the power state is not modified - no work to do. */
	if (ov8858->power_on == !!on)
		goto unlock_and_return;

	if (on) {
		ret = pm_runtime_get_sync(&client->dev);
		if (ret < 0) {
			pm_runtime_put_noidle(&client->dev);
			goto unlock_and_return;
		}

		ret = ov8858_write_array(ov8858->client, ov8858_global_regs);
		if (ret) {
			v4l2_err(sd, "could not set init registers\n");
			pm_runtime_put_noidle(&client->dev);
			goto unlock_and_return;
		}

		ov8858->power_on = true;
	} else {
		pm_runtime_put(&client->dev);
		ov8858->power_on = false;
	}

unlock_and_return:
	mutex_unlock(&ov8858->mutex);

	return ret;
}

/* Calculate the delay in us by clock rate and clock cycles */
static inline u32 ov8858_cal_delay(u32 cycles)
{
	return DIV_ROUND_UP(cycles, OV8858_XVCLK_FREQ / 1000 / 1000);
}

static int __ov8858_power_on(struct ov8858 *ov8858)
{
	int ret;
	u32 delay_us;
	struct device *dev = &ov8858->client->dev;

	if (!IS_ERR(ov8858->power_gpio))
		gpiod_set_value_cansleep(ov8858->power_gpio, 1);

	usleep_range(1000, 2000);

	if (!IS_ERR_OR_NULL(ov8858->pins_default)) {
		ret = pinctrl_select_state(ov8858->pinctrl,
					   ov8858->pins_default);
		if (ret < 0)
			dev_err(dev, "could not set pins\n");
	}

	ret = clk_set_rate(ov8858->xvclk, OV8858_XVCLK_FREQ);
	if (ret < 0)
		dev_warn(dev, "Failed to set xvclk rate (24MHz)\n");
	if (clk_get_rate(ov8858->xvclk) != OV8858_XVCLK_FREQ)
		dev_warn(dev, "xvclk mismatched, modes are based on 24MHz\n");
	ret = clk_prepare_enable(ov8858->xvclk);
	if (ret < 0) {
		dev_err(dev, "Failed to enable xvclk\n");
		return ret;
	}

	if (!IS_ERR(ov8858->reset_gpio))
		gpiod_set_value_cansleep(ov8858->reset_gpio, 0);

	ret = regulator_bulk_enable(OV8858_NUM_SUPPLIES, ov8858->supplies);
	if (ret < 0) {
		dev_err(dev, "Failed to enable regulators\n");
		goto disable_clk;
	}

	if (!IS_ERR(ov8858->reset_gpio))
		gpiod_set_value_cansleep(ov8858->reset_gpio, 1);

	usleep_range(1000, 2000);
	if (!IS_ERR(ov8858->pwdn_gpio))
		gpiod_set_value_cansleep(ov8858->pwdn_gpio, 1);

	/* 8192 cycles prior to first SCCB transaction */
	delay_us = ov8858_cal_delay(8192);
	usleep_range(delay_us, delay_us * 2);

	return 0;

disable_clk:
	clk_disable_unprepare(ov8858->xvclk);

	return ret;
}

static void __ov8858_power_off(struct ov8858 *ov8858)
{
	int ret;
	struct device *dev = &ov8858->client->dev;

	if (!IS_ERR(ov8858->pwdn_gpio))
		gpiod_set_value_cansleep(ov8858->pwdn_gpio, 0);
	clk_disable_unprepare(ov8858->xvclk);
	if (!IS_ERR(ov8858->reset_gpio))
		gpiod_set_value_cansleep(ov8858->reset_gpio, 0);
	if (!IS_ERR_OR_NULL(ov8858->pins_sleep)) {
		ret = pinctrl_select_state(ov8858->pinctrl,
					   ov8858->pins_sleep);
		if (ret < 0)
			dev_dbg(dev, "could not set pins\n");
	}

	//if (!IS_ERR(ov8858->power_gpio))
		//gpiod_set_value_cansleep(ov8858->power_gpio, 0);

	regulator_bulk_disable(OV8858_NUM_SUPPLIES, ov8858->supplies);
}

static int __maybe_unused ov8858_runtime_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct ov8858 *ov8858 = to_ov8858(sd);

	return __ov8858_power_on(ov8858);
}

static int __maybe_unused ov8858_runtime_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct ov8858 *ov8858 = to_ov8858(sd);

	__ov8858_power_off(ov8858);

	return 0;
}

#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static int ov8858_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
	struct ov8858 *ov8858 = to_ov8858(sd);
	struct v4l2_mbus_framefmt *try_fmt =
				v4l2_subdev_get_try_format(sd, fh->pad, 0);
	const struct ov8858_mode *def_mode = &supported_modes[0];

	mutex_lock(&ov8858->mutex);
	/* Initialize try_fmt */
	try_fmt->width = def_mode->width;
	try_fmt->height = def_mode->height;
	try_fmt->code = OV8858_MEDIA_BUS_FMT;
	try_fmt->field = V4L2_FIELD_NONE;

	mutex_unlock(&ov8858->mutex);
	/* No crop or compose */

	return 0;
}
#endif

static int ov8858_enum_frame_interval(struct v4l2_subdev *sd,
				      struct v4l2_subdev_pad_config *cfg,
				      struct v4l2_subdev_frame_interval_enum *fie)
{
	struct ov8858 *ov8858 = to_ov8858(sd);

	if (fie->index >= ov8858->cfg_num)
		return -EINVAL;

	fie->code = OV8858_MEDIA_BUS_FMT;
	fie->width = supported_modes[fie->index].width;
	fie->height = supported_modes[fie->index].height;
	fie->interval = supported_modes[fie->index].max_fps;
	return 0;
}

static int ov8858_g_mbus_config(struct v4l2_subdev *sd, unsigned int pad_id,
				struct v4l2_mbus_config *config)
{
	struct ov8858  *sensor = to_ov8858 (sd);
	struct device *dev = &sensor->client->dev;

	dev_info(dev, "%s(%d) enter!\n", __func__, __LINE__);

	if (2 == sensor->lane_num) {
		config->type = V4L2_MBUS_CSI2_DPHY;
		config->flags = V4L2_MBUS_CSI2_2_LANE |
				V4L2_MBUS_CSI2_CHANNEL_0 |
				V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
	} else if (4 == sensor->lane_num) {
		config->type = V4L2_MBUS_CSI2_DPHY;
		config->flags = V4L2_MBUS_CSI2_4_LANE |
				V4L2_MBUS_CSI2_CHANNEL_0 |
				V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
	} else {
		dev_err(&sensor->client->dev,
			"unsupported lane_num(%d)\n", sensor->lane_num);
	}
	return 0;
}

static const struct dev_pm_ops ov8858_pm_ops = {
	SET_RUNTIME_PM_OPS(ov8858_runtime_suspend,
			   ov8858_runtime_resume, NULL)
};

#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static const struct v4l2_subdev_internal_ops ov8858_internal_ops = {
	.open = ov8858_open,
};
#endif

static const struct v4l2_subdev_core_ops ov8858_core_ops = {
	.s_power = ov8858_s_power,
	.ioctl = ov8858_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl32 = ov8858_compat_ioctl32,
#endif
};

static const struct v4l2_subdev_video_ops ov8858_video_ops = {
	.s_stream = ov8858_s_stream,
	.g_frame_interval = ov8858_g_frame_interval,
};

static const struct v4l2_subdev_pad_ops ov8858_pad_ops = {
	.enum_mbus_code = ov8858_enum_mbus_code,
	.enum_frame_size = ov8858_enum_frame_sizes,
	.enum_frame_interval = ov8858_enum_frame_interval,
	.get_fmt = ov8858_get_fmt,
	.set_fmt = ov8858_set_fmt,
	.get_mbus_config = ov8858_g_mbus_config,
};

static const struct v4l2_subdev_ops ov8858_subdev_ops = {
	.core	= &ov8858_core_ops,
	.video	= &ov8858_video_ops,
	.pad	= &ov8858_pad_ops,
};

static int ov8858_set_ctrl(struct v4l2_ctrl *ctrl)
{
	struct ov8858 *ov8858 = container_of(ctrl->handler,
					     struct ov8858, ctrl_handler);
	struct i2c_client *client = ov8858->client;
	s64 max;
	int ret = 0;

	/* Propagate change of current control to all related controls */
	switch (ctrl->id) {
	case V4L2_CID_VBLANK:
		/* Update max exposure while meeting expected vblanking */
		max = ov8858->cur_mode->height + ctrl->val - 4;
		__v4l2_ctrl_modify_range(ov8858->exposure,
					 ov8858->exposure->minimum, max,
					 ov8858->exposure->step,
					 ov8858->exposure->default_value);
		break;
	}

	if (!pm_runtime_get_if_in_use(&client->dev))
		return 0;

	switch (ctrl->id) {
	case V4L2_CID_EXPOSURE:
		/* 4 least significant bits of expsoure are fractional part */
		dev_dbg(&client->dev, "set exposure value 0x%x\n", ctrl->val);
		ret = ov8858_write_reg(ov8858->client,
					OV8858_REG_EXPOSURE,
					OV8858_REG_VALUE_24BIT,
					ctrl->val << 4);
		break;
	case V4L2_CID_ANALOGUE_GAIN:
		dev_dbg(&client->dev, "set analog gain value 0x%x\n", ctrl->val);
		ret = ov8858_write_reg(ov8858->client,
					OV8858_REG_GAIN_H,
					OV8858_REG_VALUE_08BIT,
					(ctrl->val >> OV8858_GAIN_H_SHIFT) &
					OV8858_GAIN_H_MASK);
		ret |= ov8858_write_reg(ov8858->client,
					OV8858_REG_GAIN_L,
					OV8858_REG_VALUE_08BIT,
					ctrl->val & OV8858_GAIN_L_MASK);
		break;
	case V4L2_CID_VBLANK:
		dev_dbg(&client->dev, "set vb value 0x%x\n", ctrl->val);
		ret = ov8858_write_reg(ov8858->client,
					OV8858_REG_VTS,
					OV8858_REG_VALUE_16BIT,
					ctrl->val + ov8858->cur_mode->height);
		break;
	case V4L2_CID_TEST_PATTERN:
		ret = ov8858_enable_test_pattern(ov8858, ctrl->val);
		break;
	default:
		dev_warn(&client->dev, "%s Unhandled id:0x%x, val:0x%x\n",
			 __func__, ctrl->id, ctrl->val);
		break;
	}

	pm_runtime_put(&client->dev);

	return ret;
}

static const struct v4l2_ctrl_ops ov8858_ctrl_ops = {
	.s_ctrl = ov8858_set_ctrl,
};

static int ov8858_initialize_controls(struct ov8858 *ov8858)
{
	const struct ov8858_mode *mode;
	struct v4l2_ctrl_handler *handler;
	struct v4l2_ctrl *ctrl;
	s64 exposure_max, vblank_def;
	u32 h_blank;
	int ret;

	handler = &ov8858->ctrl_handler;
	mode = ov8858->cur_mode;
	ret = v4l2_ctrl_handler_init(handler, 8);
	if (ret)
		return ret;
	handler->lock = &ov8858->mutex;

	ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
				      0, 0, link_freq_menu_items);
	if (ctrl)
		ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;

	v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE,
			  0, ov8858->pixel_rate, 1, ov8858->pixel_rate);

	h_blank = mode->hts_def - mode->width;
	ov8858->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
				h_blank, h_blank, 1, h_blank);
	if (ov8858->hblank)
		ov8858->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;

	vblank_def = mode->vts_def - mode->height;
	ov8858->vblank = v4l2_ctrl_new_std(handler, &ov8858_ctrl_ops,
				V4L2_CID_VBLANK, vblank_def,
				OV8858_VTS_MAX - mode->height,
				1, vblank_def);

	exposure_max = mode->vts_def - 4;
	ov8858->exposure = v4l2_ctrl_new_std(handler, &ov8858_ctrl_ops,
				V4L2_CID_EXPOSURE, OV8858_EXPOSURE_MIN,
				exposure_max, OV8858_EXPOSURE_STEP,
				mode->exp_def);

	ov8858->anal_gain = v4l2_ctrl_new_std(handler, &ov8858_ctrl_ops,
				V4L2_CID_ANALOGUE_GAIN, OV8858_GAIN_MIN,
				OV8858_GAIN_MAX, OV8858_GAIN_STEP,
				OV8858_GAIN_DEFAULT);

	ov8858->test_pattern = v4l2_ctrl_new_std_menu_items(handler,
				&ov8858_ctrl_ops, V4L2_CID_TEST_PATTERN,
				ARRAY_SIZE(ov8858_test_pattern_menu) - 1,
				0, 0, ov8858_test_pattern_menu);

	if (handler->error) {
		ret = handler->error;
		dev_err(&ov8858->client->dev,
			"Failed to init controls(%d)\n", ret);
		goto err_free_handler;
	}

	ov8858->subdev.ctrl_handler = handler;

	return 0;

err_free_handler:
	v4l2_ctrl_handler_free(handler);

	return ret;
}

static int ov8858_otp_read_r1a(struct ov8858 *ov8858)
{
	int otp_flag, addr, temp, i;
	struct ov8858_otp_info_r1a *otp_ptr;
	struct device *dev = &ov8858->client->dev;
	struct i2c_client *client = ov8858->client;

	otp_ptr = kzalloc(sizeof(*otp_ptr), GFP_KERNEL);
	if (!otp_ptr)
		return -ENOMEM;

	otp_flag = 0;
	ov8858_read_1byte(client, 0x7010, &otp_flag);
	if ((otp_flag & 0xc0) == 0x40)
		addr = 0x7011; /* base address of info group 1 */
	else if ((otp_flag & 0x30) == 0x10)
		addr = 0x7016; /* base address of info group 2 */
	else if ((otp_flag & 0x0c) == 0x04)
		addr = 0x701b; /* base address of info group 3 */
	else
		addr = 0;

	if (addr != 0) {
		otp_ptr->flag = 0x80; /* valid info in OTP */
		ov8858_read_1byte(client, addr, &otp_ptr->module_id);
		ov8858_read_1byte(client, addr + 1, &otp_ptr->lens_id);
		ov8858_read_1byte(client, addr + 2, &otp_ptr->year);
		ov8858_read_1byte(client, addr + 3, &otp_ptr->month);
		ov8858_read_1byte(client, addr + 4, &otp_ptr->day);
		dev_dbg(dev, "fac info: module(0x%x) lens(0x%x) time(%d_%d_%d)!\n",
			otp_ptr->module_id,
			otp_ptr->lens_id,
			otp_ptr->year,
			otp_ptr->month,
			otp_ptr->day);
	}

	/* OTP base information and WB calibration data */
	ov8858_read_1byte(client, 0x7020, &otp_flag);
	if ((otp_flag & 0xc0) == 0x40)
		addr = 0x7021; /* base address of info group 1 */
	else if ((otp_flag & 0x30) == 0x10)
		addr = 0x7026; /* base address of info group 2 */
	else if ((otp_flag & 0x0c) == 0x04)
		addr = 0x702b; /* base address of info group 3 */
	else
		addr = 0;

	if (addr != 0) {
		otp_ptr->flag |= 0x40; /* valid info and AWB in OTP */
		ov8858_read_1byte(client, addr + 4, &temp);
		ov8858_read_1byte(client, addr, &otp_ptr->rg_ratio);
		otp_ptr->rg_ratio = (otp_ptr->rg_ratio << 2) +
				    ((temp >> 6) & 0x03);
		ov8858_read_1byte(client, addr + 1, &otp_ptr->bg_ratio);
		otp_ptr->bg_ratio = (otp_ptr->bg_ratio << 2) +
				    ((temp >> 4) & 0x03);
		ov8858_read_1byte(client, addr + 2, &otp_ptr->light_rg);
		otp_ptr->light_rg = (otp_ptr->light_rg << 2) +
				    ((temp >> 2) & 0x03);
		ov8858_read_1byte(client, addr + 3, &otp_ptr->light_bg);
		otp_ptr->light_bg = (otp_ptr->light_bg << 2) +
				    ((temp) & 0x03);
		dev_dbg(dev, "awb info: (0x%x, 0x%x, 0x%x, 0x%x)!\n",
			otp_ptr->rg_ratio, otp_ptr->bg_ratio,
			otp_ptr->light_rg, otp_ptr->light_bg);
	}

	/* OTP VCM Calibration */
	ov8858_read_1byte(client, 0x7030, &otp_flag);
	if ((otp_flag & 0xc0) == 0x40)
		addr = 0x7031; /* base address of VCM Calibration group 1 */
	else if ((otp_flag & 0x30) == 0x10)
		addr = 0x7034; /* base address of VCM Calibration group 2 */
	else if ((otp_flag & 0x0c) == 0x04)
		addr = 0x7037; /* base address of VCM Calibration group 3 */
	else
		addr = 0;
	if (addr != 0) {
		otp_ptr->flag |= 0x20;
		ov8858_read_1byte(client, addr + 2, &temp);
		ov8858_read_1byte(client, addr, &otp_ptr->vcm_start);
		otp_ptr->vcm_start = (otp_ptr->vcm_start << 2) |
				     ((temp >> 6) & 0x03);
		ov8858_read_1byte(client, addr + 1, &otp_ptr->vcm_end);
		otp_ptr->vcm_end = (otp_ptr->vcm_end << 2) |
				   ((temp >> 4) & 0x03);
		otp_ptr->vcm_dir = (temp >> 2) & 0x03;
		dev_dbg(dev, "vcm_info: 0x%x, 0x%x, 0x%x!\n",
			otp_ptr->vcm_start,
			otp_ptr->vcm_end,
			otp_ptr->vcm_dir);
	}

	/* OTP Lenc Calibration */
	ov8858_read_1byte(client, 0x703a, &otp_flag);
	if ((otp_flag & 0xc0) == 0x40)
		addr = 0x703b; /* base address of Lenc Calibration group 1 */
	else if ((otp_flag & 0x30) == 0x10)
		addr = 0x70a9; /* base address of Lenc Calibration group 2 */
	else if ((otp_flag & 0x0c) == 0x04)
		addr = 0x7117; /* base address of Lenc Calibration group 3 */
	else
		addr = 0;
	if (addr != 0) {
		otp_ptr->flag |= 0x10;
		for (i = 0; i < 110; i++) {
			ov8858_read_1byte(client, addr + i, &otp_ptr->lenc[i]);
			dev_dbg(dev, "lsc 0x%x!\n", otp_ptr->lenc[i]);
		}
	}

	for (i = 0x7010; i <= 0x7184; i++)
		ov8858_write_1byte(client, i, 0); /* clear OTP buffer */

	if (otp_ptr->flag) {
		ov8858->otp_r1a = otp_ptr;
	} else {
		ov8858->otp_r1a = NULL;
		dev_info(dev, "otp_r1a is null!\n");
		kfree(otp_ptr);
	}

	return 0;
}

static int ov8858_otp_read_r2a(struct ov8858 *ov8858)
{
	struct ov8858_otp_info_r2a *otp_ptr;
	int otp_flag, addr, temp, checksum, i;
	struct device *dev = &ov8858->client->dev;
	struct i2c_client *client = ov8858->client;

	otp_ptr = kzalloc(sizeof(*otp_ptr), GFP_KERNEL);
	if (!otp_ptr)
		return -ENOMEM;

	/* OTP base information and WB calibration data */
	otp_flag = 0;
	ov8858_read_1byte(client, 0x7010, &otp_flag);
	if ((otp_flag & 0xc0) == 0x40)
		addr = 0x7011; /* base address of info group 1 */
	else if ((otp_flag & 0x30) == 0x10)
		addr = 0x7019; /* base address of info group 2 */
	else
		addr = 0;

	if (addr != 0) {
		otp_ptr->flag = 0xC0; /* valid info and AWB in OTP */
		ov8858_read_1byte(client, addr, &otp_ptr->module_id);
		ov8858_read_1byte(client, addr + 1, &otp_ptr->lens_id);
		ov8858_read_1byte(client, addr + 2, &otp_ptr->year);
		ov8858_read_1byte(client, addr + 3, &otp_ptr->month);
		ov8858_read_1byte(client, addr + 4, &otp_ptr->day);
		ov8858_read_1byte(client, addr + 7, &temp);
		ov8858_read_1byte(client, addr + 5, &otp_ptr->rg_ratio);
		otp_ptr->rg_ratio = (otp_ptr->rg_ratio << 2) +
				    ((temp >> 6) & 0x03);
		ov8858_read_1byte(client, addr + 6, &otp_ptr->bg_ratio);
		otp_ptr->bg_ratio = (otp_ptr->bg_ratio << 2) +
				    ((temp >> 4) & 0x03);

		dev_dbg(dev, "fac info: module(0x%x) lens(0x%x) time(%d_%d_%d) !\n",
			otp_ptr->module_id,
			otp_ptr->lens_id,
			otp_ptr->year,
			otp_ptr->month,
			otp_ptr->day);
		dev_dbg(dev, "awb info: (0x%x, 0x%x)!\n",
			otp_ptr->rg_ratio,
			otp_ptr->bg_ratio);
	}

	/* OTP VCM Calibration */
	ov8858_read_1byte(client, 0x7021, &otp_flag);
	if ((otp_flag & 0xc0) == 0x40)
		addr = 0x7022; /* base address of VCM Calibration group 1 */
	else if ((otp_flag & 0x30) == 0x10)
		addr = 0x7025; /* base address of VCM Calibration group 2 */
	else
		addr = 0;

	if (addr != 0) {
		otp_ptr->flag |= 0x20;
		ov8858_read_1byte(client, addr + 2, &temp);
		ov8858_read_1byte(client, addr, &otp_ptr->vcm_start);
		otp_ptr->vcm_start = (otp_ptr->vcm_start << 2) |
				     ((temp >> 6) & 0x03);
		ov8858_read_1byte(client, addr + 1, &otp_ptr->vcm_end);
		otp_ptr->vcm_end = (otp_ptr->vcm_end << 2) |
				   ((temp >> 4) & 0x03);
		otp_ptr->vcm_dir = (temp >> 2) & 0x03;
	}

	/* OTP Lenc Calibration */
	ov8858_read_1byte(client, 0x7028, &otp_flag);
	if ((otp_flag & 0xc0) == 0x40)
		addr = 0x7029; /* base address of Lenc Calibration group 1 */
	else if ((otp_flag & 0x30) == 0x10)
		addr = 0x711a; /* base address of Lenc Calibration group 2 */
	else
		addr = 0;

	if (addr != 0) {
		checksum = 0;
		for (i = 0; i < 240; i++) {
			ov8858_read_1byte(client, addr + i, &otp_ptr->lenc[i]);
			checksum += otp_ptr->lenc[i];
			dev_dbg(dev, "lsc_info: 0x%x!\n", otp_ptr->lenc[i]);
		}
		checksum = (checksum) % 255 + 1;
		ov8858_read_1byte(client, addr + 240, &otp_ptr->checksum);
		if (otp_ptr->checksum == checksum)
			otp_ptr->flag |= 0x10;
	}

	for (i = 0x7010; i <= 0x720a; i++)
		ov8858_write_1byte(client, i, 0); /* clear OTP buffer */

	if (otp_ptr->flag) {
		ov8858->otp_r2a = otp_ptr;
	} else {
		ov8858->otp_r2a = NULL;
		dev_info(dev, "otp_r2a is null!\n");
		kfree(otp_ptr);
	}

	return 0;
}

static int ov8858_otp_read(struct ov8858 *ov8858)
{
	int temp = 0;
	int ret = 0;
	struct i2c_client *client = ov8858->client;

	/* stream on  */
	ov8858_write_1byte(client,
			   OV8858_REG_CTRL_MODE,
			   OV8858_MODE_STREAMING);

	ov8858_read_1byte(client, 0x5002, &temp);
	ov8858_write_1byte(client, 0x5002, (temp & (~0x08)));

	/* read OTP into buffer */
	ov8858_write_1byte(client, 0x3d84, 0xC0);
	ov8858_write_1byte(client, 0x3d88, 0x70); /* OTP start address */
	ov8858_write_1byte(client, 0x3d89, 0x10);
	if (ov8858->is_r2a) {
		ov8858_write_1byte(client, 0x3d8A, 0x72); /* OTP end address */
		ov8858_write_1byte(client, 0x3d8B, 0x0a);
	} else {
		ov8858_write_1byte(client, 0x3d8A, 0x71); /* OTP end address */
		ov8858_write_1byte(client, 0x3d8B, 0x84);
	}
	ov8858_write_1byte(client, 0x3d81, 0x01); /* load otp into buffer */
	usleep_range(10000, 20000);

	if (ov8858->is_r2a)
		ret = ov8858_otp_read_r2a(ov8858);
	else
		ret = ov8858_otp_read_r1a(ov8858);

	/* set 0x5002[3] to "1" */
	ov8858_read_1byte(client, 0x5002, &temp);
	ov8858_write_1byte(client, 0x5002, 0x08 | (temp & (~0x08)));

	/* stream off */
	ov8858_write_1byte(client,
			   OV8858_REG_CTRL_MODE,
			   OV8858_MODE_SW_STANDBY);

	return ret;
}

static int ov8858_check_sensor_id(struct ov8858 *ov8858,
				   struct i2c_client *client)
{
	struct device *dev = &ov8858->client->dev;
	u32 id = 0;
	int ret;

	ret = ov8858_read_reg(client, OV8858_REG_CHIP_ID,
			       OV8858_REG_VALUE_24BIT, &id);
	if (id != CHIP_ID) {
		dev_err(dev, "Unexpected sensor id(%06x), ret(%d)\n", id, ret);
		return -ENODEV;
	}

	ret = ov8858_read_reg(client, OV8858_CHIP_REVISION_REG,
			       OV8858_REG_VALUE_08BIT, &id);
	if (ret) {
		dev_err(dev, "Read chip revision register error\n");
		return -ENODEV;
	}
	dev_info(dev, "Detected OV%06x sensor, REVISION 0x%x\n", CHIP_ID, id);

	if (id == OV8858_R2A) {
		if (4 == ov8858->lane_num) {
			ov8858_global_regs = ov8858_global_regs_r2a_4lane;
			ov8858->cur_mode = &supported_modes_r2a_4lane[0];
			supported_modes = supported_modes_r2a_4lane;
			ov8858->cfg_num = ARRAY_SIZE(supported_modes_r2a_4lane);
		} else {
			ov8858_global_regs = ov8858_global_regs_r2a_2lane;
			ov8858->cur_mode = &supported_modes_r2a_2lane[0];
			supported_modes = supported_modes_r2a_2lane;
			ov8858->cfg_num = ARRAY_SIZE(supported_modes_r2a_2lane);
		}

		ov8858->is_r2a = true;
	} else {
		if (4 == ov8858->lane_num) {
			ov8858_global_regs = ov8858_global_regs_r1a_4lane;
			ov8858->cur_mode = &supported_modes_r1a_4lane[0];
			supported_modes = supported_modes_r1a_4lane;
			ov8858->cfg_num = ARRAY_SIZE(supported_modes_r1a_4lane);
		} else {
			ov8858_global_regs = ov8858_global_regs_r1a_2lane;
			ov8858->cur_mode = &supported_modes_r1a_2lane[0];
			supported_modes = supported_modes_r1a_2lane;
			ov8858->cfg_num = ARRAY_SIZE(supported_modes_r1a_2lane);

		}
		ov8858->is_r2a = false;
		dev_info(dev, "R1A work ok now!\n");
	}

	return 0;
}

static int ov8858_configure_regulators(struct ov8858 *ov8858)
{
	unsigned int i;

	for (i = 0; i < OV8858_NUM_SUPPLIES; i++)
		ov8858->supplies[i].supply = ov8858_supply_names[i];

	return devm_regulator_bulk_get(&ov8858->client->dev,
				       OV8858_NUM_SUPPLIES,
				       ov8858->supplies);
}

static int ov8858_parse_of(struct ov8858 *ov8858)
{
	struct device *dev = &ov8858->client->dev;
	struct device_node *endpoint;
	struct fwnode_handle *fwnode;
	int rval;

	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
	if (!endpoint) {
		dev_err(dev, "Failed to get endpoint\n");
		return -EINVAL;
	}
	fwnode = of_fwnode_handle(endpoint);
	rval = fwnode_property_read_u32_array(fwnode, "data-lanes", NULL, 0);
	if (rval <= 0) {
		dev_warn(dev, " Get mipi lane num failed!\n");
		return -1;
	}

	ov8858->lane_num = rval;
	if (4 == ov8858->lane_num) {
		ov8858->cur_mode = &supported_modes_r2a_4lane[0];
		supported_modes = supported_modes_r2a_4lane;
		ov8858->cfg_num = ARRAY_SIZE(supported_modes_r2a_4lane);

		/* pixel rate = link frequency * 2 * lanes / BITS_PER_SAMPLE */
		ov8858->pixel_rate = MIPI_FREQ * 2U * ov8858->lane_num / 10U;
		dev_info(dev, "lane_num(%d)  pixel_rate(%u)\n",
				 ov8858->lane_num, ov8858->pixel_rate);
	} else {
		ov8858->cur_mode = &supported_modes_r2a_2lane[0];
		supported_modes = supported_modes_r2a_2lane;
		ov8858->cfg_num = ARRAY_SIZE(supported_modes_r2a_2lane);

		/*pixel rate = link frequency * 2 * lanes / BITS_PER_SAMPLE */
		ov8858->pixel_rate = MIPI_FREQ * 2U * (ov8858->lane_num) / 10U;
		dev_info(dev, "lane_num(%d)  pixel_rate(%u)\n",
				 ov8858->lane_num, ov8858->pixel_rate);
	}
	return 0;
}

static int ov8858_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct device_node *node = dev->of_node;
	struct ov8858 *ov8858;
	struct v4l2_subdev *sd;
	char facing[2];
	int ret;

	dev_info(dev, "driver version: %02x.%02x.%02x",
		DRIVER_VERSION >> 16,
		(DRIVER_VERSION & 0xff00) >> 8,
		DRIVER_VERSION & 0x00ff);

	ov8858 = devm_kzalloc(dev, sizeof(*ov8858), GFP_KERNEL);
	if (!ov8858)
		return -ENOMEM;

	ov8858->client = client;
	ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
				   &ov8858->module_index);
	ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
				       &ov8858->module_facing);
	ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME,
				       &ov8858->module_name);
	ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME,
				       &ov8858->len_name);
	if (ret) {
		dev_err(dev,
			"could not get module information!\n");
		return -EINVAL;
	}

	ov8858->xvclk = devm_clk_get(dev, "xvclk");
	if (IS_ERR(ov8858->xvclk)) {
		dev_err(dev, "Failed to get xvclk\n");
		return -EINVAL;
	}

	ov8858->power_gpio = devm_gpiod_get(dev, "power", GPIOD_OUT_LOW);
	if (IS_ERR(ov8858->power_gpio))
		dev_warn(dev, "Failed to get power-gpios, maybe no use\n");

	ov8858->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(ov8858->reset_gpio))
		dev_warn(dev, "Failed to get reset-gpios, maybe no use\n");

	ov8858->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
	if (IS_ERR(ov8858->pwdn_gpio))
		dev_warn(dev, "Failed to get pwdn-gpios, maybe no use\n");

	ret = ov8858_configure_regulators(ov8858);
	if (ret) {
		dev_err(dev, "Failed to get power regulators\n");
		return ret;
	}

	ret = ov8858_parse_of(ov8858);
	if (ret != 0)
		return -EINVAL;

	ov8858->pinctrl = devm_pinctrl_get(dev);
	if (!IS_ERR(ov8858->pinctrl)) {
		ov8858->pins_default =
			pinctrl_lookup_state(ov8858->pinctrl,
					     OF_CAMERA_PINCTRL_STATE_DEFAULT);
		if (IS_ERR(ov8858->pins_default))
			dev_err(dev, "could not get default pinstate\n");

		ov8858->pins_sleep =
			pinctrl_lookup_state(ov8858->pinctrl,
					     OF_CAMERA_PINCTRL_STATE_SLEEP);
		if (IS_ERR(ov8858->pins_sleep))
			dev_err(dev, "could not get sleep pinstate\n");
	}

	mutex_init(&ov8858->mutex);

	sd = &ov8858->subdev;
	v4l2_i2c_subdev_init(sd, client, &ov8858_subdev_ops);
	ret = ov8858_initialize_controls(ov8858);
	if (ret)
		goto err_destroy_mutex;

	ret = __ov8858_power_on(ov8858);
	if (ret)
		goto err_free_handler;

	ret = ov8858_check_sensor_id(ov8858, client);
	if (ret)
		goto err_power_off;

	ov8858_otp_read(ov8858);

#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
	sd->internal_ops = &ov8858_internal_ops;
	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
		     V4L2_SUBDEV_FL_HAS_EVENTS;
#endif
#if defined(CONFIG_MEDIA_CONTROLLER)
	ov8858->pad.flags = MEDIA_PAD_FL_SOURCE;
	sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
	ret = media_entity_pads_init(&sd->entity, 1, &ov8858->pad);
	if (ret < 0)
		goto err_power_off;
#endif

	memset(facing, 0, sizeof(facing));
	if (strcmp(ov8858->module_facing, "back") == 0)
		facing[0] = 'b';
	else
		facing[0] = 'f';

	snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
		 ov8858->module_index, facing,
		 OV8858_NAME, dev_name(sd->dev));
	ret = v4l2_async_register_subdev_sensor_common(sd);
	if (ret) {
		dev_err(dev, "v4l2 async register subdev failed\n");
		goto err_clean_entity;
	}

	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	pm_runtime_idle(dev);

	return 0;

err_clean_entity:
#if defined(CONFIG_MEDIA_CONTROLLER)
	media_entity_cleanup(&sd->entity);
#endif
err_power_off:
	__ov8858_power_off(ov8858);
err_free_handler:
	v4l2_ctrl_handler_free(&ov8858->ctrl_handler);
err_destroy_mutex:
	mutex_destroy(&ov8858->mutex);

	return ret;
}

static int ov8858_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct ov8858 *ov8858 = to_ov8858(sd);

	v4l2_async_unregister_subdev(sd);
#if defined(CONFIG_MEDIA_CONTROLLER)
	media_entity_cleanup(&sd->entity);
#endif
	v4l2_ctrl_handler_free(&ov8858->ctrl_handler);
	if (ov8858->otp_r2a)
		kfree(ov8858->otp_r2a);
	if (ov8858->otp_r1a)
		kfree(ov8858->otp_r1a);
	mutex_destroy(&ov8858->mutex);

	pm_runtime_disable(&client->dev);
	if (!pm_runtime_status_suspended(&client->dev))
		__ov8858_power_off(ov8858);
	pm_runtime_set_suspended(&client->dev);

	return 0;
}

#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id ov8858_of_match[] = {
	{ .compatible = "ovti,ov8858" },
	{},
};
MODULE_DEVICE_TABLE(of, ov8858_of_match);
#endif

static const struct i2c_device_id ov8858_match_id[] = {
	{ "ovti,ov8858", 0 },
	{ },
};

static struct i2c_driver ov8858_i2c_driver = {
	.driver = {
		.name = OV8858_NAME,
		.pm = &ov8858_pm_ops,
		.of_match_table = of_match_ptr(ov8858_of_match),
	},
	.probe		= &ov8858_probe,
	.remove		= &ov8858_remove,
	.id_table	= ov8858_match_id,
};

static int __init sensor_mod_init(void)
{
	return i2c_add_driver(&ov8858_i2c_driver);
}

static void __exit sensor_mod_exit(void)
{
	i2c_del_driver(&ov8858_i2c_driver);
}

device_initcall_sync(sensor_mod_init);
module_exit(sensor_mod_exit);

MODULE_DESCRIPTION("OmniVision ov8858 sensor driver");
MODULE_LICENSE("GPL v2");
